Find the center and the radius of the circle.x2 + y2 + 4x + 16y = -43
A. (8, 2); r = 25
B. (2, 8); r = 25
C. (-2, -8); r = 5
D. (-8, -2); r = 5
Answer: C
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A. 221.5 B. 215 C. 221 D. 218
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Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 11
- 22
B. 11
- 2
C. 
D. 11
+ 22