Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score does he need on his next test to raise his aver

Question

Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score
does he need on his next test to raise his average to 85?

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Thu Thảo 4 years 2021-08-09T11:24:18+00:00 2 Answers 17 views 0

Answers ( )

  1. Giakhanh
    0
    2021-08-09T11:26:04+00:00
    Reply

    Answer:

    92

    Step-by-step explanation:

    (74 + 90 + 84 + 92) / 4 = 85

  2. Orla
    0
    2021-08-09T11:26:11+00:00
    Reply

    Answer:

    x ≥ 92

    Step-by-step explanation:

    let ‘x’ = necessary score

    (74 + 90 + 84 + x) / 4 ≥ 85

    (248 + x) / 4 ≥ 85

    cross-multiply:

    248 + x ≥ 340

    x ≥ 92

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