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16 May, 15:03

your grade in Class varies directly with how many hours you study. you study for 3 hours and get a 60. What grade would you get studying 4.5 hours

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  1. 16 May, 18:38
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    To do this question you can use proportions.

    3/60 is simplified to 1/20.

    This shows that if you study 1 hour you get a 20. So to find the answer you multiply each side by 4.5, this means that if you study 4.5 hours you get a 90.
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