Solve the problem.Which of the ordered pairs listed is the only possible solution for the system whose graphs are shown in the viewing window of a graphing calculator?
A. (-16, -7)
B. (-20, 12) or (16, 7)
C. (16, -7)
D. None of the above
Answer: C
Mathematics
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Simplify the expression 
A) 4 B) –12 C) 1 D) –108 E) The expression cannot be simplified.
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Select the correct graph of the polar equation. Describe your viewing window.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set. x + y + z = -1 x - y + 5z = -214x + y + z = -7
A. {(-3, -2, 4)} B. Cramer's rule does not apply since D = 0; ? C. {(-3, 4, -2)} D. {(-2, 4, -3)}
Mathematics