Question

A repair company charges a flat fee of $40 plus $30 for each hour (h) spent making a repair. Which of the following equations could be used to find the charge(c) for any service call?

(1)c=$30h
(2)c=$40h
(3)c=$40+$30h
(4)c=$40h+$30h
(5)c=$30+$40h

Answer 1

(3) c=$40+$30h

Explanation:

Since there is an initial fee for a repair, that is just added. Since the hourly fee depends on how long it takes, it needs a variable with it.

Answer 2

(3) c=$40+$30h

Explanation: