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28 August, 13:23

Janine worked 15 hours last week. One job as a clerk in a sporting goods store paid her $8.47 per hour, while her job giving piano lessons paid $17 per hour. If she earned $178.23 between the two jobs, how many hours did she work at each job?

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  1. 28 August, 16:48
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    she worked 9 hours at sporting goods store and 6 hours on piano lessons.

    Step-by-step explanation:

    total hours=15

    8.47x + 17 (15-x) = 178.23

    8.47x + 225 - 17x = 178.23

    225 - 178.23 = 17x - 8.47x

    76.77 = 8.53x

    x = 76.77 / 8.53

    x = 9

    therefore she worked 9 hours at sporting goods centre and the remaining hours (15-9) giving piano lessons.
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