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23 September, 20:48

Suppose that y varies jointly with w and x and inversely with z and y = 320 when w = 6, x = 20, and z = 3.

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  1. 23 September, 23:59
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    I suppose we are to determine the proportionality constant of the variation. The equation for this proportionality is,

    y = kwx / z

    Substituting the known values,

    320 = k (6) (20) / 3

    The value of k from the equation is 8.
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