Find the exact value by using a half-angle identity.cos 
A. 
B. - 
C. 
D. - 
Answer: D
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Solve and check your solution.6b = -108
A. 1 B. -114 C. -18 D. 114
Find the composite function for the given functions and state the domain. f ? g for f(x) = 3x + 6 and g(x) = -4x + 5
A. -12x + 29 B. -12x + 21 C. -12x D. 12x + 21
Solve the problem involving consecutive integers.If the first and third of three consecutive odd integers are added, the result is 75 less than five times the second integer. Find the third integer.
A. 25 B. 50 C. 23 D. 27
Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 420 y = 300 B. x + y = 300 x - y = 420 C. x + y = 300 y = 420 D. x + y = 420 x - y = 300