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6 July, 05:05

If y varies jointly as x and z and y = 60 when x = 3 and z = 4, find y when x is 6 and z is 8.

Can aanyone walk me through how to do this?

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  1. 6 July, 05:28
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    if y varies jointly with x & z

    then y = kxz k = constant > you need to find the constant

    first before you can solve this kind of problem

    60 = k3*4 y = 60 when x is 3 & z is 4

    12k = 60

    k = 5

    Thus y = 5*6*8 when x = 6 & z = 8

    y = 240
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