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Math Help - Rectangle

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    Rectangle

    The length of a rectangle is 10 feet less than twice the width. If the area of the rectangle is 168 square feet, find the dimensions of the rectangle?
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  2. #2
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    Quote Originally Posted by wild_flowr69
    The length of a rectangle is 10 feet less than twice the width. If the area of the rectangle is 168 square feet, find the dimensions of the rectangle?
    Hello,

    let x be the width of the rectangle. Then the length ist 2x-10. The dimension of the rectangle is x(2x-10)=168. You'll get:
    2x^2-10x-168=0
    Solve this equation for x (I'm quite sure that you know to solve a quadratic equation) and you'll get x=12 or x=-7. The last solution isn't very probable at a rectangle.

    Greetings

    EB
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