Algebra Review 4

Check all of the following functions that have a minimum:

• $f\left(x\right)=-2x^2+5x+1$

• $g\left(x\right)=3x^2-2x-8$

• $h\left(x\right)=\left(x+2\right)\left(x-5\right)$

• $j\left(x\right)=\left(5-2x\right)\left(1+x\right)$

The length of a rectangle is five less than three times the width. If the width is represented with w, what is the perimeter?

•  $P=w+\left(5-3w\right)$  

•  $P=2w+2\left(5-3w\right)$  

•  $P=w+\left(3w-5\right)$  

•  $P=2w+2\left(3w-5\right)$  

Which of the following are the solutions to the equation  $2x^2=32$  

• 4 only

• 4 and -4

• 8 only

• 8 and -8

Which of the following does NOT have a y-intercept of 5? 

•  $y=5-3x$  

•  $y=5x^2+3x-7$  

•  $y-2=x+3$  

•  $y=-x^2+x+5$  

Simplify: $5-2\left(4x-3\right)+8+x$  

•  $-7x+19$  

•  $-7x+7$  

•  $13x-1$  

•  $13x+17$  

Which situation can be modeled by an exponential function?

• The height of the flower when it was planted was 4 inches, it grows 0.25 inch every week.

• There were 46 people waiting in line for a ride and 12 people get on the ride every 3 minutes.

• A student types her final paper and is able to finish a page every 30 minutes.

• The population of bacteria triples every day.

Identify the 'a' value: y = 16x² -8x -24

• 16
• 8
• -8
• -24

Identify the 'b' value: y = 16x² -8x -24

• 16
• -8
• 8
• -24

Identify the 'c' value: y = 16x² -8x -24

• 16
• -8
• 24
• -24

find x for
x²+2x-8=0

• x= -4, 2
• x= -4, -2
• x= 4, 2
• x= -2, 4