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7 March, 10:17

A rental car company charges $35 a day plus $.15/mi for a mid-size car. A customer owes $117.15 for a three-day rental. How many miles did the customer drive?

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  1. 7 March, 10:47
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    They drove 81 miles

    Step-by-step explanation:

    Total cost = fees per day * days + miles * mileage charge

    We know the total cost = 117.15

    We know it was 3 days at 35/day

    The mileage charge is. 15 per mile

    117.15 = 35*3 + m*.15

    Multiplying

    117.15 = 105+.15m

    Subtract 105 from each side

    117.15-105 = 105-105 +.15m

    12.15 =.15m

    Divide by. 15 on each side

    12.15 /.15 =.15m/.15

    81 = m

    They drove 81 miles
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