Specify the center and radius of the circle.x2 + y2 + 12x - 18y + 53 = 0
A. center: (6, -9); radius: 64
B. center: (-9, 6); radius: 64
C. center: (9, -6); radius: 8
D. center: (-6, 9); radius: 8
Answer: D
Mathematics
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A. (10, 10)
B. (10
, 10
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C. (5
, 5
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D. (5
, 5)
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For the algebraic expression, tell whether the portion named is a term or a factor.11n2 n2 is a ________
A. term B. factor
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (cosh t)i + (sinh t)j + tk; rectifying plane at t = 0.
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Perform the indicated operation(s). Simplify if possible.
+ 
A. 
B. 
C. 
D. 
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