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24 April, 10:34

Roberta makes a $9 an hour plus a 12.5% commission selling jewelry how much does she earn on a 8 hour shift which she sells $380 worth of jewelry

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  1. 24 April, 13:07
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    The amount Roberta makes an hour is $119.5

    Explanation:

    Let the number Roberta makes be x hours.

    Amount earned in x hours shift - 9*x + 12.5% of the amount of jewelry sold.

    Number of hours worked by Roberta if 9 hours and jewelry worth $380 is sold by her.

    Substituting the values:

    Amount earned in an 8 hour shift = 9*8 + 12.5% od 380

    = 72 + 0.125 * 380 (12.5% = 0.125)

    = 12 + 47.5

    = 119.5
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