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16 June, 01:31

Given that y varies directly as x and inversely 2m-1 and that y=5 when x-7 and m=4.

Calculate

A) the constant of various the

B) the value of when x=2and m=2

The value of m whn y=2 and x=4

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Answers (1)
  1. 16 June, 03:39
    0
    Step-by-step explanation:

    y ∞ x/m

    y = kx/m

    Where k is the constant of proportionality

    A. k = ym/x

    y=5 when x=7 and m=4

    k = (5*4) / 7

    k = 20/7

    y = 20x/7m

    B) the value of when x=2and m=2

    y = 20x/7m

    y = (20*2) / (7*2)

    y = 40/14

    y = 20/7

    y = 2 6/7

    C. The value of m when y=2 and x=4

    y = 20x/7m

    7ym = 20x

    m = 20x/7y

    m = (20*4) / (7*2)

    m = 80/14

    m = 40/7

    m = 5 5/7
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