Solve.x2 + 12 < 4x
A. {4}
B. (4, ?)
C. (-?, -4)
D. ?
Answer: D
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Use the graph of a known basic function and a combination of horizontal shifts, reflections, and vertical shifts to sketch the function.f(x) = -(x - 2)2 - 5
A. 
B. 
C. 
D. 
Perform the requested operation or operations. Find the domain of each.f(x) = 
; g(x) = cos xFind f - g.
A. 
+ cos x; domain: [-2, ?)
B. 
; domain: [-2, ?)
C. (cos x)(
); domain: [-2, ?)
D. 
- cos x; domain: [-2, ?)
Solve the problem. Round amounts to the nearest tenth if necessary.Suppose that z varies jointly with x and y and that z = 504 when x = 7 and 
Find the constant of variation k. Then use z = kxy to find z when x = 7 and y = 4.
A. k = 3.9; z = 109.2 B. k = 4.9; z = 137.2 C. k = 4.5; z = 126 D. k = 56,448; z = 2016
Find the reference angle of the given angle.-373°
A. 77° B. 167° C. 13° D. 103°