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24 March, 09:48

The ice skating rink charges an hourly fee for skating and $3 to rent skates for the day. Gillian rented skates and skated for 3 hours and was charged $21. Which equation represents the cost, c (x), of ice skating as a function of x, the number of hours of skating?

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  1. 24 March, 12:46
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    C (x) = 6x + 3

    $6 per hr ... and $3 for the skates

    check ...

    c (x) = 6x + 3

    he skated for 3 hrs and was charged $21

    c (3) = 6 (3) + 3

    c (3) = 18 + 3

    c (3) = 21

    . so it is c (x) = 6x + 3
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