Algebra

posted by .

A small painting has an area of 400 cm^2. The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.

  • Algebra -

    let x = width
    2x + 4 = length
    A = lw
    A = x(2x + 4)
    400 = x(2x + 4)
    400 = 2x^2 + 4x
    200 = x^2 + 2x
    x^2 + 2x = 200
    do you know how to complete the square?

  • Algebra -

    Yes, I know how to do it from now. Thank you.

  • Algebra -

    Great!

  • Algebra -

    no i don't understand still

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    A square mirror has sides measuring 2 ft. less than the sides of a square painting. If the difference between their areas is 32 ft^2, find the lengths of the sides of the mirror and the painting?
  2. algebra

    a rectangular pool has an area of 880ft. the lenght is 10 feet longer than thw width. find the dimensions of the pool. solve by completing the square. round answer to the nearest tenth of a foot.
  3. Math Geometry

    Marisol is painting on a piece of canvas that has an area of 180 square inches. The length of the Painting is 1 1/4 times the width. What are the dimensions of the painting
  4. Math Geometry

    Marisol is painting on a piece of canvas that has an area of 180 square inches. The length of the Painting is 1 1/4 times the width. What are the dimensions of the painting this is for elementary school so make it simple
  5. Math

    Small painting has area of 400^2... Length is 4 more than 2 times width... Find the dimensions
  6. algebra

    A small painting has an area of 400 c m 2 . The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.
  7. Math, please help

    A matte of uniform width is to be placed around a painting so that the area of the matted surface is equal to the area of the painting. If the dimensions of the painting are 15 cm and 10 cm, find the width of the matte. The answer …
  8. please help, math question

    A matte of uniform width is to be placed around a painting so that the area of the matted surface is equal to the area of the painting. If the dimensions of the painting are 15 cm and 10 cm, find the width of the matte. The answer …
  9. math

    marisol is painting on a piece of canvas that has an area of 180 square inches. the lenght of the painting is 1 1/4 times the width. what are the dimensions of the painting
  10. Algebra II

    I have a question about Algebra polynomials. Question goes about this A rectangular painting is twice as long as it is wide. A frame surrounds the painting. The frame is a constant 2 inches wide and has a area of 196 square inches. …

More Similar Questions