Question

A car repair shop charged $80 per hour for labor and $210 for the parts of a car. If the total cost of repair for the car was $490, how many hours did it take to repair the car? 1) 0.59 2) 2.71 3) 3.50 4) 8.75

Answer 1

Let h = number of hours.

The shop charges $80 per hour, so for h hours of labor you pay 80h.

The parts were $210, so the parts and labor charges combined are

80h + 210

That equals $490, so we get this equation.

80h + 210 = 490

80h = 280

h = 3.5

Answer: 3) 3.5

Answer 2

490-210= 280

280/80= 3.5 or 3.50

Your answer would be 3.50

Hope this helps :)