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22 November, 16:07

A self-serve car wash charges $5.20 to use its facilities, plus an additional $0.53 for each minute the customer is at the self-serve car wash. If Tiffany was at the car wash for 6 minutes, how much was she charged?

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  1. 22 November, 16:53
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    Y = 0.53x + 5.20 ... x = # of minutes

    if she was at the car wash for 6 minutes ... x = 6

    y = 0.53 (6) + 5.20

    y = 3.18 + 5.20

    y = 8.38 < = = = she is charged $ 8.38
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