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5 April, 17:20

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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  1. 5 April, 17:47
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    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.
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