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4 September, 19:21

Rewrite the equation in the form y = k/x

xy = - 45

x = 15/y

2xy=9

what are the answers and how do i solve them?

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Answers (1)
  1. 4 September, 20:02
    0
    1.

    xy=-45 (divide both sides by x)

    xy:x = 45:x

    y = 45:x

    y = 45/x

    2.

    x=15/y (cross multiply)

    xy = 15 (divide both sides by x)

    y = 15/x

    3.

    2xy = 9 (divide both sides by 2x)

    y = 9/2x

    y = 4.5/x
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