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13 July, 10:34

Lisa studies 5 hours for a particular test and gets a score of 77. At this rate, how many hours would she have to study to get a score of 99?

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  1. 13 July, 10:38
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    77/5=99/x

    77x=5*99

    77x=495

    x=495/77

    x=6.4

    she needs to study 6.4 hrs to get 99
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