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14 December, 13:56

Laura is bowling 5 games. Her first 4 scores were 103, 138, 143, and 149.

To end up with an average score of at least 142.4, what is the lowest score Laura will need in the fifth game?

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Answers (2)
  1. 14 December, 15:30
    0
    179

    Step-by-step explanation:

    x/5=142.4

    142.4*5=712

    712-103-138-143-149=179

    double check: 179+103+138+143+149=712

    712/5=142.4
  2. 14 December, 16:26
    0
    Answer: 179

    Step-by-step explanation:

    make an inequality (103+138+143+149+x) / 5 ≥ 142.4

    then you solve the inequality

    533+x ≥ 712

    x ≥ 179 so the lowest score Laura will need is 179
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