Find the center (h, k) and radius r of the circle with the given equation. x2 - 8x + 16 + y2 + 4y + 4 = 9
A. (h, k) = (2, -4); r = 9
B. (h, k) = (4, -2); r = 3
C. (h, k) = (-4, 2); r = 9
D. (h, k) = (-2, 4); r = 3
Answer: B
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Fill in the blank with one of the words or phrases listed below. 
The graph of f(x) = ax2 + bx + c where a is not 0 is a parabola whose vertex has x-value of 
.
A. ±
B. (0, k)
C. 
D. (h, 0)
Evaluate.-6 + 3 - 10
A. -13 B. 7 C. 13 D. 1
Write the sample space for the experiment. A coin is chosen from a bag containing a penny, a nickel, a dime, and a quarter, then the coin is tossed.
A. S = {penny, nickel, dime, quarter, heads, tails} B. S = {(penny, nickel, dime, quarter), (heads, tails)} C. S = {(penny, heads), (penny, tails), (nickel, heads), (nickel, tails), (dime, heads), (dime, tails), (quarter, heads), (quarter, tails)} D. S = {(penny, heads), (nickel, tails), (dime, heads), (quarter, tails)}
Find the exact value of the expression if ? = 45°. Do not use a calculator.g(?) = sin ?Find [g(?)]2.
A. 
B. 
C. 2
D. - 