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28 April, 06:17

The average score that Kat gets on her exams is proportional to the amount of time she studies for the exam. Kat scored a 75 after studying for 15 hours. How many hours should she study for the next exam if she needs a 90 to pass the class?

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  1. 28 April, 06:38
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    75/15=90/x

    75x=90*15

    75x=1350

    x=1350/75

    x=18

    she needed to study 18 hrs to get a 90
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