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8 February, 00:05

A car rental costs $50 for the first day. Additional days cost $35 per day, unless the car is rented for 7 days or more, in which case there is a 10% discount on the daily rate. Identify the expression which represents the cost of renting a car if the car has been rented for more than a week.

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  1. 8 February, 00:34
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    29+0.08x=18+0.15x

    11 = 0.07x

    x = 157.143 miles

    Costs will be equal when the driver drives 157.143 miles
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