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I don't understand this quadratic equation: The ratio of the measures of the length and width of a rectangle is 5:7. the area of the rectangle is 1,715 square feet. Find the dimensions of the rectangle.

  • Math -

    length = 7 x
    width = 5 x

    7x * 5 x = 1715
    35 x^2 = 1715
    x^2 = 49
    x = 7

    7 x = 49
    5 x = 35

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