Math Homework Questions & Answers Archive

Consider the function: f(x) = (9x² + 25) / x Step 1. Find all critical points of the function. Separate multiple answers with cor

Find the absolute maximum and minimum values of the function f(x) = 5/(x-4) + 9 ln(x-4) on the interval [18/3, 7].

Find the resistance in a circuit where the voltage is 4+2i volts and the current is -4i amperes. The resistance R in an electrical circuit is given by the formula R=V/I, where V is the voltage, measured in volts, and I is the current in amperes. The resistance in the circuit is R= ohms. (Type your answer in the form a+bi. Use integers or fractions for any numbers in the expression.)

Find the particular solution of the following differential equation, given that the curve passes through the point (3,2). Give your answer in its simplest form: 12/x dy/dx = 6/y

1. Unfortunately a rookie error was made and a horizontal distance was observed that had not been corrected for atmospheric effects (ppm), prism/instrument index constant (mm) and instrument scale factor (ppm). Calculate what the distance would have been if all corrections were applied using the data below. (20 mks) Measured horizontal distance: 360.104 m Scale factor ppm correction: -5 ppm Atmospheric correction: 20 ppm Prism constant: -35 mm

Identify the prefix used for disaccharides: Each of the reactants in reaction A is a single sugar molecule, also called a monosaccharide. What prefix before saccharide would you use to describe sucrose?

Single Sample T-Test: A researcher would like to study the effect of alcohol on reaction time. It is known that under regular circumstances the distribution of reaction times is normal with μ = 195. A sample of 15 subjects is obtained. Reaction time is measured for each individual after consumption of alcohol. Their reaction times were: 210, 216, 211, 240, 217, 219, 221, 222, 222, 227, 228, 223, 230, 228, and 232. Use α = 0.05. Independent Sample T-Test: A researcher is interested in the anxiety levels of individuals who get in-home counseling vs those who get out-of-home counseling. The researcher measures participant anxiety scores by using questionnaire measured on a scale from 1-10. The researcher manages to gather a sample of 40 participants. Use α = 0.05 In-Home Out-of-Home 1 8 5 6 1 7 3 7 4 7 3 5 3 5 1 4 4 6 6 5 5 2 1 4 4 3 4 6 3 7 6 5 7 4 7 3 7 8 8 7

Let b be any whole number from 1 through 9. Describe a strategy for adding each pair of numbers. (a) 9+b (b) b+10 (c) I b+b

Find the product. (x+5)(x^2+3x+9) (x+5)(x^2+3x+9)= (Simplify your answer.)

In a survey of women in the United States (ages 20-29), the mean height was 64.1 inches with a population standard deviation of 2.71 inches. Women's heights are normally distributed. a) What height represents the 95th percentile? b) What height represents the first quartile?

f(x)=4/(x^3-x)

Ten randomly selected cars were filled with either regular or premium gas (the decision was made based on a coin toss) and then driven on the freeway for the entirety of the tank of gas. The next day, each car was filled with whichever type of gas that was not used the previous day and then driven on the freeway for the entirety of the tank of gas. The mileage for each day was recorded and is summarized in the table below. MPG of 10 cars (regular/premium): 13/19, 20/22, 21/24, 23/25, 22/25, 27/26, 25/26, 27/28, 28/32, 22/24. Car 1 Car 2 Car 3 Car 4 Car 5 Car 6 Car 7 Car 8 Car 9 Car 10 Regular 16 20 21 23 22 27 25 27 28 22 Premium 19 22 24 25 25 26 26 28 32 24 You will be constructing a 90% confidence interval estimate of the difference between the mean efficiency of the car using regular and premium gas. You may assume that both samples are drawn from normally distributed populations. Question 1 Construct the 90% confidence interval estimate mean difference between the mileage from cars using regular and premium gas. Round your answer to 2 decimal places. < difference between the means <

Derive the reduced modulus of elasticity Er for an idealized I-section shown in Fig. P2.12, in which it is assumed that one-half of the cross-section area is concentrated in each flange and the area of the web is disregarded.

The table below shows the fraction of games won (to the nearest thousandth) by six professional teams in the east coast and west coast leagues for the 2016 season. The lists include the teams with the best and worst win-loss records in both leagues. Complete parts (a) through (e) below. East coast teams 0.429 0.466 0.484 0.522 0.584 0.637 West coast teams 0.361 0.414 0.500 0.543 0.582 0.586 The standard deviation for the west coast teams is 0.093. d. Apply the range rule of thumb to estimate the standard deviation of each of the data sets. How well does the rule work in each case? Briefly discuss why it does or does not work well. Using the range rule of thumb the standard deviation for the east coast teams is approximately 0.052. Using the range rule of thumb the standard deviation for the west coast teams is approximately

Find the missing dimension of the regular hexagon shown to the right. Round to three significant digits if necessary. The missing dimension is approximately (1) in.

Find the area of the figure given to the right. Round to three significant digits if necessary.

8. A board that is 22 inches long is cut into two pieces. The longer piece is 4 inches longer than the other piece. How long are the pieces?

Question 8 (Multiple Choice Worth 2 points) (Volume of Rectangular Prisms MC) A coach needs to fill a rectangular container with water to have available for karate practice. If the dimensions of the container are 30 inches by 24 inches by 25.8 inches, what is the maximum amount of water that the rectangular container will hold? 18,576 in^3 9,288 in^3 4,226.4 in^3 2,113.2 in^3

The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.35°F and a standard deviation of 0.56°F. Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of healthy adults with body temperatures within 1 standard deviation of the mean, or between 97.79°F and 98.91°F? b. What is the approximate percentage of healthy adults with body temperatures between 97.23°F and 99.47°F?

Find the intervals where f(x) = (log 2 x) / x is increasing and where it is decreasing.

An angle, θ, has a reference angle of π/6 radians, and the angle θ is between π and 3π/2. Determine the exact angle measure of θ in radians.

You were asked to find all absolute extrema for the function (f(x)=4 x^3+30 x^2+48 x) on the interval ([-9,8]). Now that we know that (f'(x)=12 x^2+60 x+48), we can find the critical points. Find the values of where (f'(x)=0) and the values of (x) where (f'(x)) does not exist. Discard any solution that is outside ([-9,8]). Separate multiple answers with a comma where necessary.

A company created a new container in the shape of a triangular prism that will hold sunflower seeds. The container will be made from cardboard. How many square inches of cardboard are needed to make one container? Assume there are no overlapping areas.

Determine two other, different positive angles that are coterminal with the angle ( phi=frac7 pi10 )

Construct a table of values for the function. (Round your answers to three decimal places.) f(x) = 2^(x+1) + 3 x -2 -1 0 1 2 f(x) 3.5 5 Sketch the graph of the function.

1. Given the polynomial function f(x) = x^4 - 5x^3 - 7x^2 + 10x + 14 A. State the coordinates of the x-intercepts. B. State the coordinates of the relative maximums. C. State the coordinates of the relative minimums. D. State the range of the function using interval notation.

Use the graph of y=f(x) to find the limits: Step 1 of 2 : Find lim x→1− f(x).

Simplify. 8 sqrt(45)

81x^3 + 100x = 180x^2

А6 Найдите наименьшее целое отрицательное решение системы неравенств (2x+1)/4-(x-3)/8>-5 4(x+3)-7 >= 5(x-3) А7 Найдите значение выражения ((m/(m-6)-(2m)/(m^2-12m+36)) * (36-m^2)/(m-8)+12m/(m-6) при m=2 А8 Плиточник планирует уложить 168 м^2 плитки. Если он будет укладывать на 2 м^2 в день больше, чем запланировал, то закончит работу на 2 дня раньше. Сколько квадратных метров плитки в день планирует укладывать плиточник?

Sketch the graph of the polynomial function. f(x)=2x^4+3x^3-8x^2+3x Choose the correct graph below. A. B. C. D.

Definizione di funzione pari e dispari - Teorema fondamentale dell'aritmetica - Definizione di logaritmo - Definizione di funzione inversa e significato geometrico (simmetria rispetto alla bisettrice del I e III quadrante) - Definizione di funzioni monotone - Definizione di intorno - Definizione di massimo e minimo assoluto - Definizione di massimo e minimo locale - Definizione di maggiorante e minorante - Definizione di estremo superiore e estremo inferiore - Definizione di successione - Definizione di funzione limitata - Definizione di punto di accumulazione e punto isolato - Definizione di limite - Definizione di limite destro e sinistro - Teorema di unicità del limite - Definizione di successione geometrica - Definizione di successione monotona - Teorema (esistenza del limite per successioni monotone) - Teorema (esistenza del limite per funzioni monotone) - Teorema del prodotto tra una successione limitata e una tendente a 0 - Teorema del confronto - Teorema della permanenza del segno - Definizione di infiniti e infinitesimi - Confronto tra infiniti e infinitesimi - Teorema di cancellazione per infiniti - Teorema di cancellazione per infinitesimi - Definizione di funzione continua - Definizione di funzione continua da destra o da sinistra - Teorema (continua se e solo se continua da destra e da sinistra) - Definizione di funzione discontinua e tipi di discontinuità - Teorema degli zeri - Teorema dei valori intermedi (o di Darboux) - Teorema di Weirstrass - Teorema invertibilità e continuità - Definizione di derivata - Significato geometrico del rapporto incrementale coefficiente angolare della retta secante che passa per A e B - Significato geometrico di derivata coefficiente angolare della retta tangente al grafico - Definizione di derivata destra e sinistra - Punto di cuspide, punto angoloso e punto di flesso - Teorema (se è derivabile in un punto allora è continua in quel punto) + dimostrazione

A silo (base not included) is to be constructed in the form of a cylinder surmounted by a hemisphere. The cost of construction per square unit of surface area is 4 times as great for the hemisphere as it is for the cylindrical sidewall. Determine the dimensions to be used if the volume is fixed and the cost of construction is to be kept to a minimum. Neglect the thickness of the silo and waste in construction. If r is the radius of the hemisphere, h the height of the cylinder, and V the volume, then r= and h= . (Type exact answers, using π as needed.)

A integral [ intQ frac99 x+74 y1+8 x+6 y d x wedge d y ] sobre o quadrilátero Q de vértices [ (0,0) quad(6,-8) quad(-370,495) quad(-364,487) ] é da forma ln (N) para algum inteiro N. Determine N.

In Exercises 1-10, approximate each number using a calculator. 10. e^(-0.75) Round your answer to three decimal places. 1. 2^(3.4) 2. 3^(2.4) 3. 3^(sqrt(5)) 4. 5^(sqrt(3)) 5. 4^(-1.5) 6. 6^(-1.2) 7. e^(2.3) 8. e^(3.4)

Graph the function defined by y=k(x) on an appropriate viewing window. k(x)=9(x-0.5)(x+0.4)(x+0.1)(x-0.2) Please select the graph of k(x).

Question 2: Write a formula for the following polynomial function. You need to show JUSTIFICATION to your answer.

Find the B-matrix for the transformation x ↦ A x, where B=b1, b2. A=[ [ -6 1 ] [ 3 1 ] ], b1=[ [ -1 ] [ -1 ] ], b2=[ [ 1 ] [ 2 ] ] The B-matrix of the given transformation is .

Problem 2 (6 Points) You are given f(x)=(x^10-x-2)/(x+1) and f(x) is defined for all values except x ≠ -1. Using the equation of f(x) and WITHOUT graphing, check whether or not x=-1 is a vertical asymptote or a removable discontinuity. You will need to reference what must be true about f(x) for there to be a removable discontinuity at x=-1 and show all algebraic work!

Question Part 3 of 3 Derivatives (1) Solve the following initial value problem. The second derivative of s with respect to t is equal to -k (k constant), with the first derivative of s with respect to t equal to 66 and s equals 0 when t equals 0. (2) Find the value of t that makes the first derivative of s with respect to t equal to 0. (The answer will involve k.) (3) Find the value of k that makes s equal to 242 for the value of t found in step (2). (1) s equals 66t minus k times t squared over 2 (2) t equals 66 over k, when the first derivative of s with respect to t equals 0 (3) When s equals 242 for the value of t found in step (2), k equals (8712 minus 66 squared) over 484.

Use Cramer's Rule to solve the system: 2x1 + x2 - x3 = 1 3x1 + 2x2 + 2x3 = 13 4x1 - 2x2 + 3x3 = 9

The production function for a print shop is q=2000 * min(L, 3K), where q is the number of sheets printed per hour, L is the number of workers, and K is the number of printers. For example, if L=8 and K=2, then min(L, 3K)=6 and q=12,000. Draw the isoquants for this production function when q=2000, q=6000, and when q=12,000, you should draw three isoquants. Note what are K and L at each vertex.

Calcule as integrais indefinidas: (a) ∫(x+3) dx

Let A=PDP^-1 and P and D as shown below. Compute A^4. P=[ 1 4 2 7 ], D=[ 2 0 0 3 ] A^4= (Simplify your answer.)

Fill in the blanks below to find the products: 10 × 3/4 = 10 × □ ÷ = □ = 10 × 3/4 = 10 ÷ - × = Why are these equivalent?

log7 9 + log7 4

Solve the system of equations using Cramer's Rule 4x + 8y = 20 -4x + 2y = -30

Identify the function whose graph appears above. It is either: f(x) = A tan(x) + k or it is f(x) = A cot(x) + k.

Find the y-intercept of the function 5y-3x=15. (0,-3) (0,3) (3,0) (-3,0)

Rationalize the denominator of the expression. [ fracsqrta+sqrtbsqrta-sqrtb ]

Simplify the expression. [ frac8 a^2-35 a b-25 b^28 a b^2+5 b^3 ]

(a) Lena makes fruit salad using a ratio of 2 blueberries to 10 strawberries. Give the unit rates for this relationship. One unit rate: strawberries for each blueberry Another unit rate: (Choose one) for each (Choose one) (b) How many blueberries are needed if 15 strawberries are used?

A city's population in the year x=1956 was y=3,424,500. In 1977 the population was 3,428,700. Compute the slope of the population growth (or decline) and choose the most accurate statement from the following: The population is increasing at a rate of 100 people per year. The population is decreasing at a rate of 200 people per year. The population is decreasing at a rate of 400 people per year. The population is increasing at a rate of 400 people per year. The population is decreasing at a rate of 100 people per year. The population is increasing at a rate of 200 people per year.

Write the following ratio using two other notations. 4 to 5 Use only the numbers above (not any others).

(2) a=1/(3-2√2) とする。 (1) a の分世を住理化し、筒出にせよ。 (2) a の小改部分を b とするとも、光，bの值を求めよ、また、 a^2-b^2 の慎を求めよ。（3） b を(2)で氷めた値とし、 p は定教とする。 x にいての不等式 p<x<p+4b (1) か (䭃点 25) pの傎の施囲を求めよ。

(-9h^4 + 27h^3) / h^2

Is the point (2,10) a solution of the equation y=2x+1?

Solve the system by substitution. Verify your solution using a graphing calculator. y=4(x-4) y=-3(x+3) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution is (Simplify your answer. Type an ordered pair.) B. The solution set is the infinite set of solutions of the equation y=4(x-4). C. The solution set is the empty set.

Find the values of (x)

Determine the surface area of this composite object, which is a right cylinder and a hemisphere, to the nearest tenth of a square metre. HINT: One end of the cylinder is covered, so should not be included in the final answer.

Una encuesta sobre 520 personas reveló los siguientes datos acerca del consumo de dos productos A y B: 410 personas consumían por lo menos uno de los dos productos. 290 personas consumían A. 75 personas consumían A pero no B. a. ¿Qué porcentaje de personas consumia B? b. ¿Qué porcentaje de personas consumía sólo B? c. ¿Qué porcentaje de personas consumía los dos productos? d. ¿Qué porcentaje de personas no consumía ninguno de los dos productos?

Lesson 6: Connecting Similarity and Transformations Cool Down: Forward and Backwards? Determine if each statement must be true, could possibly be true, or definitely can't be true. Explain or show your reasoning. 1. Congruent figures are similar. 2. Similar figures are congruent.

Solve the following equation: 3.4(s-5)-2.1=8.1 s=

Question 6 Choose the equation representing the graph below. f(x)=1+√x f(x)=√(1-x) f(x)=√(x-1) None of these choices f(x)=-√x+1

Which of the following are irrational numbers? Select all correct answers. Select all that apply: √11 0.1414141414 ... 0.8282282228 ... √18

When the right half of a histogram is a mirror image of the left half, the histogram is (Choose one) . symmetric unimodal skewed right > skewed left

Equations and Inequalities Finding the roots of a quadratic equation of the form ax^2+bx=0 Solve for x. 6 x^2=12 x If there is more than one solution, separate them with commas. If there is no solution, click on "No solution". x=

Which expression is equivalent to sqrt(128 x^5 y^6 / 2 x^7 y^5) ? Assume x>0 and y>0. x sqrt(y) / 8 y sqrt(x) / 8 8 sqrt(x) / y 8 sqrt(y) / x

Find the values of the variables in the equation. [ left[ beginarrayll -9 7 -8 0 endarray right] = left[ beginarrayrr -9 x y z endarray right] ] [ beginarrayl x=7 y=-8 z=0 endarray ]

Completely factor the given polynomial, if possible. If the polynomial cannot be factored, indicate "Not Factorable". cq + cu + qx + ux

Write the given inequality using interval notation, and illustrate the inequality using the real number line. x < -2 Use interval notation to express the inequality. What is the resulting interval? Choose the graph that illustrates the inequality on the real number line. A. B. C. D.

Complete the following table by stating whether the polynomial is a monomial, binomial, or trinomial; then list its terms (entered as a comma-separated list) and state its degree. Polynomial Type Terms Degree -8 Select- Complete the following table by stating whether the polynomial is a monomial, binomial, or trinomial; then list its terms (entered as a comma-separated list) and state its degree. Polynomial Type Terms Degree x-x^2+x^4-x^5- Select-

Week 2: Ch 11 (Part 1) Solving a Systems Classifying systems of linear equations System A Line 1: y=-x-2 Line 2: y=-x-3 This system of equations is: consistent dependent consistent independent inconsistent This means the system has: a unique solution

There are approximately 39.37 inches in 1 meter. How many meters are there in 239 inches?

4b[2a^2-5(3ab-2b^2)]+29ab^2

Using the digits 0,1,2, ... 8,9, determine how many 8-digit lock combinations are possible according to the following criteria. Zero cannot be used for the first digit; digits may be repeated. The number of possible 8-digit lock combinations is .

2x^7+3x^6-12x^3+9 is Select an answer 2x^4+7/x^3-3x^2+12 is Select an answer 7x^3 is Select an answer 19x^6-8x^2+10 is Select an answer 5x^8+2 is Select an answer

Find the slope. m=(7-3)/(7-5) Select one: a. -2 b. 2 c. 5 d. 6

What does FOIL stand for when factoring? Factoring, Out, Inside, Later Reynolds Wrap First, Outer, Inner, Last Greatest common factors

Describe the sampling distribution of hatp based on large samples of size n-that is, given the mean, the standard deviation, and the (approximate) shape of the distribution of hatp when large samples of size n are (repeatedly) selected from the binomial distribution with a probability of success p. Let q=1-p.

Select the correct answer. What are the solutions of the quadratic equation below? 2 x^2 - 2 x - 9 = 0 A. (-1 ± √19)/2 B. (3 ± √19)/2 C. (1 ± √19)/2 D. (1 ± 3√19)/2

Use the properties of logarithms to condense the following expression. [ (1/2) ln x+ln (x^2-1)-ln (x+1) ]

y=1/2 x-1 y=1/2 x+5 How many solutions does the system of equations have? no solution one solution infinitely many solutions

Look at this diagram: If P R and S U are parallel lines and m angle P Q O=132°, what is m angle R Q O?

Evaluate the expression without using a calculator. [ (2^2 cdot 4)^2 ]

Which of the figures below are congruent? A B C D (A) B and C (B) A and C (C) B and D (D) A and D

Determine the slope of the equation 4x + 1/2 y = -6

Express in simplest radical form. 6 sqrt(175) + 7 sqrt(28)

Determine whether the equation defines y as a function of x. 2x-3y=5 The equation defines y as a function of x. The equation does not define y as a function of x. Determine whether the equation defines y as a function of x. x^2+(y-5)^2=6 The equation defines y as a function of x. The equation does not define y as a function of x.

Find the indicated side of the right triangle.

Simplify. 5(-y-4 z)-2(-5 z-6 y)

Simplify. Assume all variables are positive. [ sqrtfrac9 x^32 y^2= ]

Multiply: 8 · 5/2 Give your answer as a fraction, reduced to lowest terms

Test: Chapter 1-Appendix-A Question list Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 The graph shows a relationship between price, x, and quantity demanded, y. Use the graph to answer the question. This function is perfectly inelastic. The slope of this relationship at point A is

Which conic section is formed when a plane intersects the central axis of a double-napped cone at a 90° angle?

Final Exam Find the area. Area of square=[?] in^2 Area of triangle= square in^2 Remember: Asquare=bh 18 in Area of Figure = square in^2

Graphs, Functions, and Systems Choosing a graph to fit a narrative: Basic (a) Kaitlin fills her pool with water. (b) Lamar walks from home to school.

L .3 proving triangles congruent by SSS and SAS WZ R is the midpoint of QS. Complete the proof that triangle RSU is congruent to triangle RQT. 1. R is the midpoint of QS - Given 2. QT is congruent to SU - Given 3. RT is congruent to RU - Given 4.

Solve for x in 4 cos ^2(x)=1 x=-60^circ x=60^circ x=120^circ x=-60^circ, 60^circ x=60^circ, 120^circ

For the exponential function f(x)=4 * 6^x, what is the value of f(-3)?

A tree casts a 25-foot shadow on a sunny day, as shown in the diagram below. If the angle of elevation from the tip of the shadow to the top of the tree is 32 degrees, what is the height of the tree to the nearest tenth of a foot?

Greatest Common Factor (GCF) - Quiz - Level F Marcus collects donations and sends care packages to troops overseas. He has 36 bars of soap and 24 toothbrushes and wants to arrange the items so the packages are identical. What is the greatest number of packages that Marcus can make using all the soap and toothbrushes? What is the greatest number of packages of soap and toothbrushes that Marcus can make? Marcus can make at most packages.

(5.7 × 10^21) × (1.2 × 10^-18)

In due villaggi dell'Amazzonia la popolazione di uno era i 5/6 della popolazione dell'altro. Una grave epidemia costrinse a emigrare 70 abitanti di ogni villaggio, per cui attualmente il primo villaggio ha i 4/5 degli abitanti del secondo. Quanti abitanti ha oggi ciascun villaggio?

Use the distributive property to rewrite each expression. 6(7+8) 6(7+8)= (Type an expression. Do not simplify.)

Which undefined term is used to define an angle?

2000 ml =? L

Which describes the system of equations below? 3x-10y=-4 20x-y=-20 consistent and dependent inconsistent consistent and independent Submit

Geometry ≥+2.3 Proving triangles congruent by SSS and SAS WZ Y is the midpoint of UW and VX. Complete the proof that triangle UXY is congruent to triangle WVY. 1. Y is the midpoint of UW - Given 2. Y is the midpoint of VX - Given 3. VW is congruent to UX - Given 4. UY is congruent to WY - Definition of midpoint

Algebra 2 Sem1 Quiz 2.2.1 - Factoring Factor completely: 9 x^2 + 12 x + 4 a. (2 x + 3)^2 b. (3 x + 2)^2 c. (3 x + 2)(3 x - 2) d. (2 x + 3)(3 x + 2)

In right triangle XYZ, angle X and angle Z are complementary angles and cos(X) is 9/11. What is sin(Z) ? A. 11/9 B. 9/11 C. sqrt(20)/9 D. sqrt(20)/11

A triangle is half the side of a rectangle. The area by two. The formula for the area of a triangle can Example 1: Find the area of the triangle. A=(b b)+2 A=(8 * 8)+2 A=64 / 2 A=32 yd^2

A small hole in the wing of a space shuttle requires a 16.3 cm^2 patch. What is the patch's area in square kilometers (km^2) ? Be sure your answer has the correct number of significant figures. 1.63 x 10^-9 km^2 If the patching material costs NASA 2.85 / in^2, what is the cost of the patch to the nearest cent? Be sure your answer has the correct number of significant figures.

Workers at A La Mode Ice Cream Parlor hand churn batches of ice cream and put them in the freezer. The temperature of the ice cream x hours after a batch is put into the freezer is given by the function f(x). The temperature is measured in degrees Fahrenheit. What does f(6)=f(7) tell you? The temperature of the ice cream after 6 hours is the same as after 7 hours.

The sales of vinyl records have increased due to a revived popularity. In the year 2012, 50,000 records were sold. Every following year, the number of records sold were 1.1 times the number of records sold the previous year. From 2012 to the end of 2016, how many vinyl records were sold? A. 80,525 records B. 255,255 records C. 73,205 records D. 305,255 records

Question 19 of 25 The graph of the reciprocal parent function, f(x)=1/x, is shifted 7 units up and 2 units to the right to create the graph of g(x). What function is g(x) ? A. g(x)=1/(x+7)+2 B. g(x)=1/(x-2)+7 C. g(x)=1/(x-7)+2 D. g(x)=1/(x+2)+7

In a laboratory experiment, the population of bacteria in a petri dish started off at 850 and is growing exponentially at 8% per day. Write a function to represent the population of bacteria after t days, where the hourly rate of change can be found from a constant in the function. Round all coefficients in the function to four decimal places. Also, determine the percentage rate of change per hour, to the nearest hundredth of a percent.

Question 6 6 of 13 Evaluate and match each expression on the left to its value on the right, when x=4 and y=7. 12+x 3x+y 4y-10 1/2 xy 18 19 14 16

Find the mean, ( barx ), of the data. 3,4,5,7,10,12,15 ( overlinemathrmx=[?] )

Evaluate the following radical. [ sqrt[3]-216 ]

X is the midpoint of W. Complete the proof that triangle UWX is congruent to triangle UVX. - Statement - Reason 1. X is the midpoint of VW - Given 2. W perpendicular to UX - Given 3. angle UXV is congruent to angle UXW - All right angles are congruent 4. VX is congruent to WX - Definition of midpoint 5. UX is congruent to UX - Reflexive Property of Congruence 6. triangle UWX is congruent to triangle UVX -

For what values of X will Germany export cars and import wine? (Check all that apply.) □ 900 □ 820 □ 1 □ 950 □ 900 □ 820 □ 800 For what values of X will Germany import cars and export wine? (Check all that apply.) A German worker takes 600 hours to produce a car and X hours to produce a wine.

5x - y - 2 = 0 x^2 - 2xy + y^2 = 4

Do Homework - R1.8 HW - Exponents and Order of Question 4, R1.8.15 Simplify the algebraic expression, or indicate that the expression cannot be simplified. 17 x^2 + 12 x^2 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. This cannot be simplified because the coefficients are different. B. This cannot be simplified because the coefficients are the same. C. This cannot be simplified because the variable factors of the terms are the same. D. 17 x^2 + 12 x^2 = □ (Simplify your answer.) E. This cannot be simplified because the variable factors of the terms are different.

Find the standard deviation, σ, of the data. 84,98,70,76,88,76 x̄=82 Variance (σ^2)=85.3 σ=[?] Round to the nearest tenth.

The number of years N(r) since two independently evolving languages split off from a common ancestral language is approximated by N(r)=-5000 ln r Where r is the proportion of the words from the ancestral language that are common to both languages now. a. N(0.9)=530 (Round to the nearest tens place.) b. N(0.5)=3500 (Round to the nearest hundreds place.) c. N(0.3)= (Round to the nearest thousands place.)

Describe the solution to the system of equations graphed below. The system has infinitely many solutions of the form y=-x+3, where x is any real number. The system has no solutions. The system has a unique solution at (2,1). The system has a unique solution at (1,2).

Multiply. Write your answer as a mixed number in simplest form. 5 × 3 2/3

Find the general indefinite integral. (Use C for the constant [ int(4 x^2+6+frac4x^2+1) d x ]

How many solutions does this system - have? - -x+3 y=3 - 2 x-6 y=30 None One Infinite

(a) Find the following side lengths for the net. A=7 mm B=10 mm C=4 mm D=4 mm (b) Use the net to find the surface area of the prism. mm^2

Number Theory and the Real Number System Properties of real numbers Choose the property of real numbers that justifies the equation. 0 · 5 = 0 Choose one 7 + (-7) = 0 Choose one (s · t) · c = s · (t · c) Choose one (6 + 8) + 9 = 6 + (8 + 9) Choose one Explanation Check

Thin lines that show solid, cutaway surfaces in a section view are called lines.

Suppose we want to choose 7 objects, without replacement, from 12 distinct objects. (If necessary, consult a list of formulas.) (a) How many ways can this be done, If the order of the choices matters? (b) How many ways can this be done, if the order of the choices does not matter?

Complete the square. Fill in the number that makes the polynomial a perfect-square quadratic. j^2 + 4j + □

Sketch the graph of f(x) = 2^(x+4).

An intelligence scale for children is approximately normally distributed, with mean 100 and standard deviation 15. Complete parts (a) through (f) below. (a) What is the probability that a randomly selected test taker will score above 125 ? 0.0478 (b) What is the probability that a randomly selected test taker will score below 90 ? 0.2525 (c) What proportion of test takers will score between 110 and 140 ? 0.2487 (d) Would it be unusual for a randomly selected child to have a score above 150 ? because P(X>150)= .

Use the order of operations to simplify the expression. 6-5[-4(7-7)-4(3-5)] 6-5[-4(7-7)-4(3-5)]=

Identify each of the following as either descriptive or inferential statistics. The average income of a random sample of 190 high school principals in 2018 was 52,100. Choose the correct answer below. A. It is inferential statistics because it uses a sample to make a claim about a population. B. It is inferential statistics because it summarizes the information in a sample. C. It is descriptive statistics because it summarizes the information in a sample. D. It is descriptive statistics because it uses a sample to make a claim about a population.

In a recent poll, 45% of survey respondents said that, if they only had one child, they would prefer the child to be a boy. Suppose you conducted a survey of 130 randomly selected students on your campus and find that 73 of them would prefer a boy. (a) Use the normal approximation to the binomial to approximate the probability that, in a random sample of 130 students, at least 73 would prefer a boy, assuming the true percentage is 45%. (b) Does this result contradict the poll? Explain. (a) The probability that at least 73 students would prefer a boy is . (Round to four decimal places as needed.)

Selected values of the twice-differentiable function g are given in the table above. What is the value of the integral from 0 to 4 of g'(x) * arctan^2(2g(x)+3) dx? x 0 1 2 3 4 g(x) 1 1/8 -3/4 -13/8 -5/2

Find all real zeros of the function. [ g(x)=-4(x-9)^2(x+3)^3 ]

Determine whether each table below represents y as a function of x. x -3 4 3 -2 1 -1 y 6 -3 9 -10 -3 13 This is a function False x 0 -6 -6 -5 -8 -3 y 5 -2 8 -10 -7 13 This is a function False x -10 -8 -2 -6 -9 2 y 5 -1 10 -10 20 15 This is a function True

Find the GCF for the list. 45 y^3, 63 y^2

If each quadrilateral below is a rectangle

Find the domain and range of the following relation. Also determine whether the relation is a function. (1,3),(1,5),(1,6),(1,9)

Determine if the series below is a telescoping series. [ sumn=1^inftyleft(10^n+2+19^n+3right) ] Select the correct answer below: The series is telescoping. The series is not telescoping.

A flat screen television is advertised as being 35 inches on its diagonal. If the TV is 18 inch tall, then how wide is the screen? The screen is inches wide. Round your answer to the nearest tenth as needed

Solve the system of equations by the substitution method. 4x + 2y = 4 -2x = y + 4 Select the correct choice below and, if necessary, fill in the answer box to complete y A. The solution is (Type an ordered pair. Simplify your answer.) B. There are infinitely many solutions. C. There is no solution.

Geometry Finding the missing length in a figure Try Again The value in your answer is incorrect. Find the missing side length. Assume that all intersecting sides meet at right angles. Be sure to include the correct unit in your answer. Explanation

9-3 ÷ (1/3) + 1 = ?

Factor out the GCF from the polynomial. z(y+2)-7(y+2)

IXC My IXL Learning Assessment Analytics IXL. Spotlight - Algebra 1> EE, 10 Checkpoint: Radicals and rational exponents KTK Which of the following are equivalent to 1/4 ? Select all that apply. (8^-3)^(1/3) (sqrt[3]64)^2 sqrt[4]1/16 (sqrt[3]1/8)^2

Evaluate the expression for z=-3.2. z^2 z^2=

Addition Explain how you would add 64+12. Make sure to use words like tens and ones place.

Equations and Inequalities Adding or subtracting complex numbers Subtract. [ (-3+2 i)-(-2+4 i) ] Write your answer as a complex number in standard form.

Question 4 (Mandatory) (3.1 points) The minimally accepted level of significance is the level of significance. A Question 5 (Mandatory) (3.1 points) An important implication of the formula for the standard error (of the mean) is that whenever the sample size increases, the value of the standard error

Il vettore vec(a) e il vettore 10 vec(a) hanno in comune tutte le caratteristiche seguenti tranne una: quale? A La direzione B Il modulo (C) Il verso D L'unità di misura del modulo

What type of transformation uses a scale factor to change the size of a figure? (A point)

The area of a rectangle is 35 ft², and the length of the rectangle is 8 ft less than three times the width. Find the dimensions of the rectangle. Length : Width :

Which represents a quadratic function with no x-intercepts? (A) y=-(x-1)^2 (B) y=-(x-1)^2+3 (C) y=(x+1)^2-3 (D) y=(x+1)^2+3

Solve the system of equations by using a table. y=3x-4 y=-2x+11 x y -3 0 1 3 6

Factor the trinomial. x^2 + 4x + 4 =

Jackson earns 48,000 per year at his job as a home health aide and is paid monthly. His most recent paycheck includes the following deductions: FICA 306.00 Federal income tax 320.00 State income tax 200.00 Health insurance 135.25 Retirement savings 250.50 Considering his deductions, what percentage of his gross pay did Jackson take home?

1 - cos 2 x / 2 can be simplified to: 1/2 - cos z cos^2 z sin^3 z 1-cos a

Find the actual length of the car. The car length is □ feet. (Round to the nearest tenth.)

What is the reciprocal of 100? a. 100 b. 0.1 c. 0.01 d. 0.2

Write an equation of the function whose graph is shown in the figure below. y=-4 cos (π/5 x)-3 y=4 sin (π/5 x)-3 y=4 cos (π/5 x)+3 y=-4 sin (π/2 x)+3

Given a=12 cm, b=19 cm, and γ=87°, find the angles of all possible triangles. Round answers to the nearest degree. c ≈ 7 cm, α ≈ 33°, β ≈ 60° c ≈ 22 cm, α ≈ 33°, β ≈ 60° c ≈ 7 cm, α ≈ 60°, β ≈ 33° c ≈ 22 cm, α ≈ 60°, β ≈ 33°

2x + 5y = 1 -4x - 10y = -2

x^2 = 5x + 14

Use a calculator in degree or radian mode, as appropriate, to evaluate each expression. Round your answer to five decimal places. (a) csc(15°) (b) sin(3.7)

Geometry > Q. 11 Trigonometric ratios: find a side length UZC Find XY. Write your answer as an integer or as a decimal round XY=

3.596 × 10^5 + 5.03 × 10^6 =

The actual number of survey subjects with this response is 183. (Round to the nearest whole number as needed.) d. Assume that 153 of the survey subjects are females. What percentage of those surveyed are females? % (Round to the nearest whole number as needed.)

Use the graph of f to state the value of each quantity, If it exists. If infinite, specify e a. lim x -> -4^- f(x) = □ b. lim x -> -2 f(x) = □ c. f(-2) = □ d. lim x -> 1^+ f(x) = □ e. lim x -> -1 f(x) = □ f. lim x -> 3^- f(x) = □ g. lim x -> 3^+ f(x) = □ h. f(3) = □ i. lim x -> -∞ f(x) = □ j. lim x -> ∞ f(x) = □

Solve and graph the following inequality. 0.2 x < -18 Select the correct choice below and fill in the answer box to complete your choice. A. The solution set is x x ≤ 3. B. The solution set is x x ≥ C. The solution set is xx> D. The solution set is x x< Which of the following is the graph of the solution? A. B. C. D.

Find the additive inverse or opposite. -4

4^(2x-5) = 2^(3x+7)

lim as x approaches -∞ of (1-x^2)/(1+x^2)

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