Pre-Calc Sem 1 Review #2

Simplify:  $\frac{21x^2y^4}{14x^5y}$  

•  $\frac{3y^3}{2x^3}$  

•  $\frac{7y^3}{2x^3}$  

•  $\frac{3x^3}{2y^3}$  

•  $7x^3y^3$  

Simplify:  $\sqrt{20x^5y^4}$  

•  $2x^2y^2\sqrt{5x}$  

•  $10x^2y^2\sqrt{x}$  

•  $2x^2y^2$  

•  $10x^2y^2\sqrt{x}$  

The conjugate of  $5-\sqrt{6}$  

•  $5-\sqrt{6}$  

•  $-5-\sqrt{6}$  

•  $5+\sqrt{6}$  

•  $-5+\sqrt{6}$  

Multiply:  $\left(5-\sqrt{6}\right)\left(5+\sqrt{6}\right)$  

• 0

• -11

• 19

• -1

Solve:  $3\left|x-2\right|=12$  

• 6, -2

• 6

• 6, -6

• 2, -2

Find  $f\circ g\left(3\right)\$  if f(x) = 3x - 4 and  $g\left(x\right)=3x^2$  

• 75

• 5, 27

• 77

• 144

 $y=2\left(x-3\right)^2+4$  What does this function graph?

• line

• parabola

• Absolute value

• a chicken

 $y=2\left(x-3\right)^2+4$  What is the vertex of this parabola?

• (2, -3)

• (3, 4)

• (-3, 4)

• (-3, -4)

What formula do you use to find max value of a parabola?

• x = -b/2a

• $a^2+b^2=c^2$

• A = xy

• 2L + 2W = P

Does this function have a max or min?
 $f\left(x\right)=-2x^2+8x+11$  

• Max

• Min

• Max/Min

• Min/Max