Solve by completing the square to obtain exact solutions.x2 + 8x = 7
A. 4 + 
B. -1 ± 
C. -4 ± 2
D. -4 ± 
Answer: D
Mathematics
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? is an acute angle and sin ? is given. Use the Pythagorean identity sin2 ? + cos2 ? = 1 to find cos ?.sin ? = 
A. 3
B. 2
C. 
D. 
Mathematics
Perform the indicated operations and simplify.Let A = 
, B = 
, and C = 
. Find AB + BC.
A. 
B. 
C. 
D. 
Mathematics
Answer the question or provide an explanation.Indicate whether the provided information suggests that Y1 and Y2 are inverse functions.
A. No B. Yes
Mathematics
Express the given function H as a composition of two functions f and g such that H(x) = (f ? g)(x).H(x) = 
A. f(x) = 
, g(x) = 5x + 2
B. f(x) = 
, g(x) = 3
C. f(x) = 
, g(x) = 5x + 2
D. f(x) = 3, g(x) = 
Mathematics