The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) = 0?
A. -6, 7, 10
B. (-6, 7)
C. (-10, -6), (7, 10)
D. -6
Answer: A
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Find the value of the objective function at each corner of the graphed region. Use this information to answer the question. 
Objective Functionz = -x - 9yWhat is the maximum value of the objective function?
A. -30 B. -38 C. -47 D. -22
Determine the specific solutions (if any) to the equation on the interval [0, 2?).sin 2? + sin ? = 0
A. 
, 
B. no solution
C. 
, 
, 
, 
D. 0, 
, ?, 
Solve.The equation ? = cos-1 (R/Z) gives the phase angle between R and Z in an AC circuit. Find ? if R = 40 ohms and Z = 50 ohms.
A. 36.9° B. 143.1° C. 0.7° D. 53.1°
Fill in the blank with one of the words or phrases listed below.
The 
of a number is the factorization in which all the factors are prime numbers.
A. 0 B. prime factorization C. reciprocals D. simplest form