Algebra II

posted by .

A rectangle is 5 inches wide and 6 inches long. If each side is increased by x, the area is tripled. What is the value of x?

  • Algebra II -

    (5+x)(6+x) = 3*30 = 90

    30 + 11 x + x^2 = 90

    x^2 + 11 x - 60 = 0

    (x+15)(x-4) = 0

    x = 4
    check
    9*10 = 3*30 yes

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. algebra

    A rectangle is 16 inches wide and 20 inches long. If the length of this rectangle is changes, how many square inches of are are added for every inch in length that is added to this rectangle?
  2. Math

    If the width of a rectangle is increased by 2 inches, the area is 140 square inches. If the legnth is increased by 1 inch, the area is 120 inches. Find the dimensions of the rectangle.
  3. geometry

    A rectangle with an area of 32 inches squared has one side measuring 4 inches. A similar rectangle has an area of 288 inches squared. How long is the longer side in the larger rectangle?
  4. math

    A rectangle is 4 inches wide by 7 inches long. When the length and width are increased by the same amount, the area is incresed by 26 square inches. What are the dimensions of the new rectangle?
  5. pre-algebra

    One side of a rectangle is 6 in and the other side is x inches. Find the possible value of x if the area must be at least 84 sq inches.
  6. Math

    A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the area is tripled. Find the value of x.
  7. Algebra

    The length of a rectangle is (x+2) inches. The width of the rectangle is (x+1) inches. Write an equation that can be used to determine the area (A) of the rectangle in terms of x. What is the value of x if the area of the rectangle …
  8. math

    A rectangular piece of construction paper is 11 inches long and 8 inches wide. How could it be cut to make a rectangle that has an area of 32 square inches?
  9. MATH

    How many squares of side 5 inches can be cut from a piece of cartolina 48 inches long and 36 inches wide. What area of the paper will be wasted?
  10. Math

    Hector baked a cake for his moms birthday. It is in the shape of a rectangle 16 inches long and 12 inches wide. He plans to put a candle at each corner and spaced 4 inches apart along each side. How many candles will he need?

More Similar Questions