Chapter 9 BEST Test Prep

Use the graph to solve –x² – 2x + 3 = 0.

• x = 4

• x = 3 and x = –1

• x = –3 and x = 1

• no real solution

Which graph represents the function r(x) = (x + 3)² – 2?

• 
• 
• 
• 

Which graph represents the solutions of –3n < 15?

• 
• 
• 
• 

Which of the following are solutions of 54 = 6x²? Select all that apply.

• x = –9

• x = –3

• x = 0

• x = 3

• x = 9

Which function represents the line that contains the points (8, –3) and (0, –9)?

• f(x) = 3/4x - 9

• f(x) = 4/3x - 9

• f(x) = 2/3x - 9

• f(x) = -3/4x - 9

• 2

You jump off the high dive at a swimming pool. Your height as a function of time is modeled by

h = -16t² + 12t + 30, where t is the time in seconds after you jump and h is the height in feet. What is your maximum height, in feet?

You need to buy a piece of canvas that is large enough to stretch and secure around a wooden frame. You plan that the length of your finished piece will be 5 inches less than twice the width, and you will need 2 inches extra on each side to secure the canvas to the frame. Which expression represents the area of the canvas?

• 2w² + 7w - 4

• 2w² + 2w - 5

• 5w² + 7w - 2

• 5w² + 3w - 2

Which expression is equivalent to -3√6 + 4√24?

• 5√6

• 11√6

• 7√30

• √30

Find the solution of x² - 16x + 64 = 49.

• ( x = -4 ) and ( x = 4 )

• ( x = 8 ) and ( x = 7 )

• ( x = 5 ) and ( x = -3 )

• ( x = 15 ) and ( x = 1 )