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30 July, 16:19

Kailey plays video games for x hours a month. Trent plays video games four hours more than Kailey and Megan plays two times more than Trent. Which expression represents the amount of time Megan spends playing video games?

A). 2 (4x)

B). 2x + 4

C). 2x - 4

D). 2 (x + 4)

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Answers (1)
  1. 30 July, 16:37
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    D. 2 (x + 4)

    Now you get that answer by working the problem. For instance, Kailey plays x hours per month, so we get

    K = x

    Now Trent plays 4 more hours than Kailey, so we get

    T = K + 4.

    Since we know that K = x, we can substitute x for K and get

    T = x + 4

    Now Megan plays two times as much as Trent. So we get

    M = 2T

    But since T = x + 4 we can subsitute x + 4 for T, getting

    M = 2 (x + 4)

    We need the parenthesis because multiplication has a higher priority than addition and without the parenthesis the multiply by 2 wouldn't have affected the addition of 4.
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