Questions: Which equation below best represents the number of cars washed per day at the local car wash? A c=2 d+18 B c=d/20 C c=2 d+36 D c=20 d

Solution Steps

Day 1: 20 cars Day 2: 40 cars Day 3: 60 cars Day 4: 80 cars

A. c = 2d + 18 Day 1: 2(1) + 18 = 20. Day 2: 2(2) + 18 = 22. This equation doesn't work.

C. c = 2d + 36 Day 1: 2(1) + 36 = 38. This equation doesn't work.

D. c = 20d Day 1: 20(1) = 20 Day 2: 20(2) = 40 Day 3: 20(3) = 60 Day 4: 20(4) = 80. This equation works.

Final Answer