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27 April, 21:43

Y varies directly with x, and y = 12 when x = 5. What is the value of y when x = 8?

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  1. 28 April, 00:16
    0
    Y=x/k

    12=5/k

    k=5/12

    k = x/y

    5/12=8/y

    y = 12*8/5

    y = 96/5

    y = 19.05
  2. 28 April, 00:36
    0
    Y varies directly as x means y=kx or k=y/x where k is the constant of variation

    find k

    y=12 and x=5

    k=12/5

    y=kx

    when x=8

    y = (12/5) (8)

    y=96/5
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