A car rental agency charges $50 per week plus $0.50 per mile to rent a car. What is the weekly cost to rent the car, f, as a function of the number of miles driven during the week, x. How many miles did you drive during the week if the weekly cost to rent the car was $100?

Question

Mathematics

Lewis Foley

22 June, 22:06

A car rental agency charges $50 per week plus $0.50 per mile to rent a car. What is the weekly cost to rent the car, f, as a function of the number of miles driven during the week, x. How many miles did you drive during the week if the weekly cost to rent the car was $100?

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Answers (1)

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Liberty Ray · Answer 1

A) The cost in dollars is given as 50 + 0.50x, so ...

f (x) = 0.50x + 50

B) You want to find x for f (x) = 100. Substitute the given numbers and solve for x.

100 = 0.50x + 50

50 = 0.50x

50/0.50 = x

100 = x

You drove 100 miles during the week if the cost was $100.