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4 April, 21:34

If y varies inversely as x, and y = 5 as x = - 2, find y for the x-value of 3.

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Answers (2)
  1. 4 April, 23:07
    0
    Y varies inversly as x means

    y=k/x

    k is constantt

    find k

    so

    5=k/-2

    times - 2 both sides

    -10=k

    y=-10/x

    when x=3

    y=-10/3
  2. 4 April, 23:08
    0
    Since y varies inversely to x

    xy = k

    so 5*-2 = - 10

    plug x and k into xy = k

    -10 = 3y

    divide both sides with 3

    y = - 10/3 or - 3.3333
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