A repair service charges by the hour. The amount of money they charge is below. What equation does the repair service use to charge customers?

Question

c = 30h + 70
c = 40h
c = 30h + 40
c = 40h + 30

Answer 1

The repair service uses the equation: c = 30h + 70

Explanation: The equation has two components, the first part 30h represents the number of hours the repair service worked and the second part, 70 represents the fixed cost without any working hours (includes service charge or any necessary part cost).