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20 December, 18:44

Suppose j varies jointly with g and v, and j=1 when g=6 and v=3.

Find the constant variation and find j when g=8 and v=11

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  1. 20 December, 22:09
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    "Joint variation " means "directly, but with two or more variables". Thus, we write as follows:

    j α gv

    We insert proportionality constant k, to change it to equality.

    j = kgv

    We solve k,

    1 = k (4) (3)

    k = 1/12

    j = gv/12

    j = 8 (11) / 12

    j = 22/3
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