Question

18. Emma rents a car from a company that rents cars by the hour. She has to pay an initial fee of $75, and then they charge her $9 per hour. Write an equation for the total cost Cif Emma rents the car for h hours. If Emma has budgeted $250 for the rental cars, how many hours can she rent the car? Assume the car cannot be rented for part of an hour.​

Answer 1

Explanation:

Let h be the number of hours.

Total Cost = Fixed Costs + Variable Cost

= Initial Fee + Hourly Charge

= 75 + 9h

Given,

`75 + 9h = 250 \\ 9h = 250 - 75 \\ 9h = 175 \\ h = 175 / 9 \\ = 19 (4)/(9) hr`

Since the car cannot be rent part of an hour, the highest possible whole number is 19 hours.