Math

Suppose a farmer has 120 feet of fencing to make a rectangular barnyard enclosure. If the enclosure is x feet long, express the area A of the enclosure as a function of the length x. Briefly explain.

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  2. 6
asked by Breanna
  1. if length is x, then width is (120-2x)/2

    Area is then length x width or
    x * (60-x)

    1. 0
    posted by bobpursley
  2. A(x) = 60x – x2

    A(x) = 120x – x2

    A(x) = x2 – 30x

    Are any of these the answers?

    1. 0
    posted by Breanna
  3. The 2 meaning squared of course so

    A(x) = 60x – x^2

    A(x) = 120x – x^2

    A(x) = x^2 – 30x

    1. 0
    posted by Breanna
  4. x(60-x)=60x-x^2

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    posted by bobpursley
  5. So A is the answer then?

    A(x) = 60x – x^2

    This was my first guess, was I correct?

    1. 0
    posted by Breanna
  6. what is the square root of negtive 80

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    posted by Robert
  7. I do not know. Does this have anything to do with my problem?

    1. 0
    posted by Breanna

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