Chapter 8 Test, Form 2C

Find each sum or difference.

(5n²-2ny-3y²)-(9n²-8ny-10y²)

• 4n²-13y²+6ny

• -4n²+6ny+13y²

• 4n+6ny+13

• 13-ny-4n²

Find each sum or difference.

(11m²-2mt+8t²)+(8m²+4mt-2t²)

• 19m²+2mt+6t²

• -19m²+2t+6t²

• -19m²+2mt+6t²

Find each product

(5c-4)²

• 25c²-40c-16b

• 25c²-40c+16

• -25c²-40c+16

• 25c²⁺40bc+16

Factor each polynomial

9a²+42a-49

• 9a²+15a

• 52a-49

• prime

• 9a²-49

Factor each polynomial

t²-11t+24

• (t²-11t)+24

• (t-8)(t-3)

• (t+8)(t-3)

• (t+8)(t+3)

Solve each equation

8n+11=4+5(2n-1)

• 7

• 9

• 6

• 1

Solve each equation

16y²-8y=0

• (7,1/2)

• (0,1/2)

• (3, 1/4)

• (2, 1/3)

One number is 5 times another number. The product of the two numbers is 245. Find the two numbers.

• (-6,6)

• (-7,7)

• (9,-9)

• (2,-2)

Tonisha hit a baseball into the air with an initial upward velocity of 48 feet per second. The height h in feet of the ball above the ground can be modeled by h=-16t²+48t+2, where t is the time in seconds after Tonisha hit the baseball. Find the time it takes the ball to reach 38 feet above the ground.

• 1 1/2 sec

• 2 sec

• 2 1/2 sec

• 3 sec

The length of a rectangular garden is 8 feet longer than its width. The garden is surrounded by a sidewalk that is 4 feet wide and has an area of 320 sqaure feet. Find the dimensions of the garden.

• w=10ft, w+8=20ft

• w=12ft, w+8=20ft

• w=2ft, w+3=23ft

• w=16t, w+9=20ft