02-10-2018
Mathematics

contestada

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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moony29 moony29

09-10-2018

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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