Find the directrices of the hyperbola.y2 - 16x2 = 16
A. y = ± 
B. x = ± 
C. y = ± 
D. y = ± 
Answer: C
Mathematics
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Write the solution set in interval notation.{x|x ? -5}
A. (-?, -5) B. (-5, ?) C. [-5, ?) D. (-?, -5]
Mathematics
Find the value of the determinant.
A. -8 B. 4 C. 8 D. 64
Mathematics
For the pair of functions, find the indicated composition.f(x) = 
, g(x) = 3x3Find (g ? f)(x).
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A radio transmission tower is 120 feet tall. How long should a guy wire be if it is to be attached 7 feet from the top and is to make an angle of 28° with the ground? Give your answer to the nearest tenth of a foot.
A. 255.6 ft B. 240.7 ft C. 135.9 ft D. 128.0 ft
Mathematics