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3 October, 14:18

David received three grades of 85,92, and 100 on his first 3 tests. What must he get on the fourth test to get a 90 average?

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  1. 3 October, 16:22
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    83

    Step-by-step explanation:

    All you have to do here is set up an equation.

    (85+92+100+x) / 4=90

    Then find x which is his 4th test score

    85+92+100+x=360

    x=360-85-92-100

    x=83
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