Adv. Algebra Final Exam Review

Find the inverse of  $f\left(x\right)=x^2-4$  

•  $f^{-1}\left(x\right)=\sqrt{x+16}$  

•  $f^{-1}\left(x\right)=\sqrt{x-4}$  

•  $f^{-1}\left(x\right)=\sqrt{x}+4$  

•  $f^{-1}\left(x\right)=\sqrt{x+4}$  

Find the inverse of  $f\left(x\right)=-5x-7$  

•  $f^{-1}\left(x\right)=\frac{5x+7}{-7}$  

•  $f^{-1}\left(x\right)=\frac{x+5}{7}$  

•  $f^{-1}\left(x\right)=\frac{x+7}{-5}$  

•  $f^{-1}\left(x\right)=\frac{7}{-5+x}$  

Are these inverse functions?

• yes
• no
• no way to tell

Are these functions inverses?

• Yes
• No

What is the inverse of the given coordinates: (1, 2) (3, 8) (-3, 6)

• (1, 2) (3, 8) (-3, 6)
• (1, 2) (8, 3) (-3, 6)
• (-1, -2) (-3, -8) (3, -6)
• (2, 1) (8, 3) (6, -3)

If f^-1(-25) = 7 then what is f(7) = 

• 25
• 7
• No enough information. 
• -25

Find the mean:
28, 18, 19, 18, 17

• 20
• 18
• 11
• 19

Calculate the mean.

2, 9, 10, 6, 8

• 8

• 4

• 7

• 22

What is the median of this data set?
3 , 17 , 17 , 11 , 8 , 13 , 5 , 18

• 11
• 12
• 13
• 17

The height of three basketball players is 210 cm, 220 cm and 191 cm.
What is their average height?

• 210
• 207
• 220
• 200