Math Problem Statement

The area of a rectangular carpet is 10x2−3x−27 . The length of the carpet is 5x−9 yards. Complete the statement to describe the width of the rectangle.

The width of the rectangle is

Solution

We know the area of the rectangular carpet is given by the expression 10x23x2710x^2 - 3x - 27, and the length is 5x95x - 9. To find the width of the rectangle, we can use the formula for the area of a rectangle:

Area=Length×Width\text{Area} = \text{Length} \times \text{Width}

Let ww be the width. Therefore, we have:

10x23x27=(5x9)×w10x^2 - 3x - 27 = (5x - 9) \times w

To solve for ww, we divide both sides of the equation by 5x95x - 9:

w=10x23x275x9w = \frac{10x^2 - 3x - 27}{5x - 9}

Now, we will perform polynomial division to simplify the expression for the width.

Step 1: Polynomial division of 10x23x2710x^2 - 3x - 27 by 5x95x - 9

  1. Divide the first term: 10x25x=2x\frac{10x^2}{5x} = 2x
  2. Multiply 2x2x by 5x95x - 9 to get 10x218x10x^2 - 18x
  3. Subtract (10x218x)(10x^2 - 18x) from 10x23x2710x^2 - 3x - 27, which leaves us with: (10x23x27)(10x218x)=15x27(10x^2 - 3x - 27) - (10x^2 - 18x) = 15x - 27
  4. Divide the first term: 15x5x=3\frac{15x}{5x} = 3
  5. Multiply 33 by 5x95x - 9 to get 15x2715x - 27
  6. Subtract (15x27)(15x - 27) from 15x2715x - 27, and the remainder is 0.

Thus, the width of the rectangle is:

w=2x+3w = 2x + 3

Final Answer:

The width of the rectangle is 2x+32x + 3 yards.

Would you like more details or have any questions?

Related questions:

  1. How do you factor a quadratic expression like 10x23x2710x^2 - 3x - 27?
  2. What is the process of polynomial division, and how is it used?
  3. Can the area formula for a rectangle be applied to other shapes with known dimensions?
  4. How can you check if a division of polynomials was performed correctly?
  5. How does the quadratic nature of the area expression affect the problem's complexity?

Tip: When performing polynomial division, carefully align terms of the same degree to avoid errors in subtraction and simplification!

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Math Problem Analysis

Mathematical Concepts

Algebra
Polynomial Division
Quadratic Equations

Formulas

Area = Length × Width
Polynomial division

Theorems

Polynomial Division Theorem

Suitable Grade Level

Grades 9-10