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26 September, 03:32

John knows that his first 4 tests grades were 84, 79, 82, and 88. Find John's grade on the test if his average was 83.8.

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  1. 26 September, 03:39
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    86

    Step-by-step explanation:

    The average is the sum of all the grades divided by the number of tests.

    83.8 = (84 + 79 + 82 + 88 + x) / 5

    419 = 333 + x

    x = 86
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