Math

posted by Breanna

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.

  1. bobpursley

    if length is x, then width is (120-2x)/2

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

  2. Breanna

    A(x) = 60x – x2

    A(x) = 120x – x2

    A(x) = x2 – 30x

    Are any of these the answers?

  3. Breanna

    The 2 meaning squared of course so

    A(x) = 60x – x^2

    A(x) = 120x – x^2

    A(x) = x^2 – 30x

  4. bobpursley

    x(60-x)=60x-x^2

  5. Breanna

    So A is the answer then?

    A(x) = 60x – x^2

    This was my first guess, was I correct?

  6. Robert

    what is the square root of negtive 80

  7. Breanna

    I do not know. Does this have anything to do with my problem?

Respond to this Question

First Name

Your Answer

Similar Questions

  1. pre-calc

    a farmer wants to make a rectangular enclosure using a wall as one side and 120 m of fencing for the other three sides. a) express the area in terms of x and state the domain of the area function b)find the value of x that gives the …
  2. Math

    Please help with this problem! Brandon wishes to fence in a rectangular area of his lawn for his rabbit. If the measure, in feet, of each side of the enclosure is a positive integer and the perimeter of the enclosure is 70 feet, what …
  3. Algebra

    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.
  4. math

    Chris wants to make an enclosed rectangular area for a mulch pile. She wants to make the enclosure in such a way as to use a corner of her back yard. She also wants it to be twice as long as it is wide. Since the yard is already fenced, …
  5. Calculus

    A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure …
  6. math

    María plans to enclose a rectangular area of her yard using the 16-foot side of her storage shed as one side of the enclosure, as shown above. If she uses 64 feet of fencing to complete the enclosure, what will be the length, x, of …
  7. Algebra

    A builder has 80 feet of fencing to create an enclosure adjacent to a long existing wall. He will use the wall for one side and the available fencing for the remaining three sides. If the sides perpendicular to the wall have length …
  8. Calculus

    A farmer has 120 meters of wire fencing to make enclosures for his pigs and cows. The rectangular enclosure he is considering will have one side up against a barn (in the center of one side that is 150 meters long, so the enclosure …
  9. Algebra

    To make an enclosure for chickens, a rectangular area will be fenced next to a house. Only 3 sides will need to be fenced. There is 120 ft. of fencing material. a. What quadratic function represents the area of the rectangular enclosure, …
  10. maths

    A farmer has 120 metres of fencing. He is going to make a rectangular enclosure PQRS with the fencing. He is also going to divide the enclosure into two equal parts by fencing along MN. SNR The width of the enclosure is x metres. The …

More Similar Questions