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17 June, 23:28

The sum of the real numbers x and y is 11. their difference is 5. what is the value of xy? explain how you got your answer.

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  1. 17 June, 23:34
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    (1) x+y=11 given

    (2) x-y=5 given

    x=5+y equality property of addition (add y to both sides of (2)

    5+y+y=11 sub previous result in to (1)

    2y=6 algebra and simplificatiuon

    y=3 division property of equality (divide both sides by 2)

    x=8 again sub previous into (1)
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