4.2B Applications with Polynomials

How would you find the perimeter?

• (3x + 2) (x + 7)

• (3x + 2) + (x + 7)

• (3x + 2) + (3x + 2) + (x + 7) + (x + 7)

• (3x + 2)(3x + 2)(x + 7)(x + 7)

The sides of a square are (2x² - 5) inches long. How would you find the area?

• (2x² - 5) + (2x² - 5) + (2x² - 5) + (2x² - 5)

• 4(2x² - 5)

• (2x² - 5)(2x² - 5)(2x² - 5)(2x² - 5)

• (2x² - 5)(2x² - 5)

A stick is (4x - 2) feet long. Someone cuts off a piece that is (x + 1) feet. How long is the remaining part of the stick?

• (4x - 2) + (x + 1)

• (4x - 2)(x + 1)

• (4x - 2) - (x + 1)

• (x + 1) - (4x - 2)

How would you find the area?

• (3x + 2) (x + 7)

• (3x + 2) + (x + 7)

• (3x + 2) + (3x + 2) + (x + 7) + (x + 7)

• (3x + 2)(3x + 2)(x + 7)(x + 7)

Xue has (x + 5) dollars. Tre has (4x² - 2x) dollars. How much do they have combined?

• (x + 5) + (4x² - 2x)

• (x + 5) - (4x² - 2x)

• (4x² - 2x) - (x + 5)

• (x + 5)(4x² - 2x)

The area of a rectangle is (3x² + 2x - 1) square inches. The length is (x - 2) inches. How would you find the width?

• (3x² + 2x - 1) + (x - 2)

• (3x² + 2x - 1) - (x - 2)

• (3x² + 2x - 1)(x - 2)

• (3x² + 2x - 1) / (x - 2)

Xue has (4x² - 2x) dollars. He gives Tre (x + 5) dollars. How much money does Xue have now?

• (x + 5) + (4x² - 2x)

• (x + 5) - (4x² - 2x)

• (4x² - 2x) - (x + 5)

• (x + 5)(4x² - 2x)

The sides of a square are (2x² - 5) inches long. How would you find the perimeter?

• (2x² - 5) + (2x² - 5) + (2x² - 5) + (2x² - 5)

• (2x² - 5) + (2x² - 5)

• (2x² - 5)(2x² - 5)(2x² - 5)(2x² - 5)

• (2x² - 5)(2x² - 5)

The length of a box is (4x + 2) inches. The width is (x - 5) and the height is (2x + 7). Find the volume of the box.

• (4x + 2) + (x - 5) + (2x + 7)

• (4x + 2) - (x - 5) - (2x + 7)

• (4x + 2) + (x - 5) - (2x + 7)

• (4x + 2)(x - 5)(2x + 7)

Tia is driving (4x - 9) miles to visit her brother. She drives (x + 4) miles each hour. How many hours will it take for her to reach her destination?

• (4x + 9) + (x + 4)

• (4x + 9) - (x + 4)

• (4x + 9) (x + 4)

• (4x + 9) / (x + 4)