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18 May, 22:52

Y varies jointly with w and x, inversely with z, and suppose y=360 when w = 8, x=15, and z = 3. Write the equation that models this relationship

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  1. 18 May, 23:43
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    Y varies jointly with w and x, inversely with z

    this means that

    y ∝ wx / z

    in equation form

    y = kwx / z

    where k is the proportionality constant

    360 = k (8) (15) / 3

    k = (360) (3) / (8) (15)

    k = 9

    so the eqution is

    y = 9wx / z
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