If X2 - Y2 = 28 And X-y=8, What Is The Average (arithmetic Mean) Of X And Y?

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Madhumita 4 Years Ago
577

If x2 - y2 = 28 and x-y=8, what is the average (arithmetic mean) of x and y?

asked Jun 15 12:00:00 AM

Madhumita

Q: 339 A: 0

1 Answers

  • 40

    Answer is = 7/4

    Explanation-

    x^2 - y^2 = 28

    (x+y)*(x-y) = 28

    But 

    x-y = 8

    therefore

    (x+y)*8 = 28  (1)

    Avarage of x and y means, (x+y)/2

    therefore divinding equation (1) by 2

    = {(x+y)/2} 

    = 28/(8*2)

    = 7/4

    4 Years Ago

    asked Oct 15 12:00:00 AM

    Sangeeta

    Q: 22 A: 1924

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