Review for chapter 0, 4, 5

 $Simplify\ \left(2-7i\right)\left(4+2i\right)$  

• 6 – 24i

• 22 – 24i

• 22 – 6i

• 6 – 6i

 $Simplify\ \sqrt{32x^5y^2}$  

•  $4x^2\left|y\right|\sqrt{2x}$  

•  $4x^2y\sqrt{2x}$  

•  $4x^3y\sqrt{2x}$  

U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, R = {2, 6, 7, 8}, S = {6, 8, 9}, and T = {3, 4, 5}. Find R ∪ T.

• {2, 6, 7, 8, 9}

• {2, 3, 4, 5, 6, 7, 8}

• ∅

• {1, 9, 10}

Simplify (8 + 3i) ÷ (5 – 7i).

• $19-41i$

• $\frac{19+71i}{74}$

• $\frac{-61-71i}{24}$

• $61-41i$

Find the axis of symmetry of the graph of g(x) = x² - 5x + 2.

• x = -5

• x = 2

• x = 5/2

• x = -5/2

What is the y-intercept of the function y = 2x² + 1

• 1

• None

• 3

• 0

How many different two-person teams can be made from 6 people?

• 15

• 30

• 360

• 120

 $Find\ the\ period\ of\ the\ function\ f\left(x\right)\ =\ \csc\left(\frac{x}{4}-\frac{\pi}{2}\right)$  

•  $\frac{\pi}{2}$  

•  $\frac{\pi}{3}$  

•  $8\pi$  

•  $4\pi$  

Sketch the graph of y = tan 3x.

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• 
• 

 $y=-3\tan x$  

• 
•