Applications of Quadratics

Given the diagram below find the value if x if the area is 21 square meters.

• 7

• -3

• 3

• -7

The dimensions of a rectangle can be given by x +7 and x + 2. If the ares of the rectangle is 66 square inches, what are the dimensions of the rectangle.

• 4 X 13

• -6 X -11

• 11 X 6

• 20 X 15

The length of a rectangle is 6 meters more than its width. If the area of the rectangle is 135 square meters, find its dimensions.

• 15 X 21

• 9 X 15

• -9 X -15

• 6 X 12

The length of a rectangle is 1 meter less than its width. The area of the rectangle is 42 square meters. Find the dimensions of the rectangle.

• 7 X 6

• -7 X -6

• 6 X 5

• -6 X -5

When a cannonball is fired the equation of its pathway can be modeled by h = -16x² + 128t. Find the maximum height of the cannonball

• 8 ft.

• 0 ft.

• 256 ft.

• 4 ft.

When a cannonball is fired the equation of its pathway can be modeled by h = -16x² + 128t. Find the time it will take for the cannonball to reach the ground.

• 8 sec.

• 0 sec.

• 256 sec.

• 4 sec.

When Joey dives of a diving board, the equation of his pathway can be modeled by h = -16t² + 15t + 12. Find Joey's maximum height.

• 0.52 ft.

• 1.45 ft.

• 0.46 ft.

• 15.52 ft.

When Joey dives of a diving board, the equation of his pathway can be modeled by h = -16t² + 15t + 12. Find the time it will take Joey to reach the water.

• 0.52 sec.

• 1.45 sec.

• 0.47 sec.

• 15.52 sec.

A toy rocket is launched from a platform that is 48 ft. high. The rocket's heigh above the ground is modeled by h = -16t² + 32t + 48. Find the maximum height of the rocket.

• 169 ft.

• 1 ft.

• 3 ft.

• 64 ft.

A toy rocket is launched from a platform that is 48 ft. high. The rocket's heigh above the ground is modeled by h = -16t² + 32t + 48. Find the time it will take for the rocket to reach the ground.

• 169 sec.

• 1 sec.

• 3 sec.

• 64 sec.