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Mathematics-please help quick!!

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The lenght of a rectangle is 10cm greater than its width. The perimeter of the rectangle is 1m. A.Find the simplest expression for the perimeter for the rectangle if the width is x.B. Find the width of the rectangle. C. Calculate the area of the rectangle. Answers: A=20+x .B=20 .C=600

  • Mathematics-please help quick!! - ,

    width = x
    length = (x+10)
    P = 2x + 2(x+10) = 4x+20

    4x+20 = 100
    x + 5 = 25
    x = 20

    A = x(x+10) = x^2 + 10 x
    = 400 + 200
    = 600

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