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12th grade

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The legnth of a rectangular floor is 2 feet more than it's width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the legnth of the rug be?

  • 12th grade-Math -

    Your first job should be to determine the dimensions of the floor.
    Let X = width, then
    X + 2 = length.
    The area is 168; therefore,
    X(X+2) = 168 which expands to
    X^2 + 2X - 168.
    Solve that for X and X+2 then look to see how much smaller the rug should be. Post your work if you get stuck.

  • 12th grade -

    the rug should 2

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