Use half-angle identities to find the exact value of the expression.sin (-112.5°)
A. - 
B. - 
C. 
D. 
Answer: A
Mathematics
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Determine where the graph of the function is increasing, decreasing, concave up, concave down. Then sketch the graph.g(x) = 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The Mathematics Department is holding an election for department chair. Each member ranks the candidates from first to third. The preference table below shows the results of the ballots with candidates Clark (C), Jones (J), and Smith (S). 
If the plurality method is used to determine the winner and Clark drops out, is the irrelevant alternatives criterion satisfied?
A. Yes B. No
Mathematics
Find the least common multiple.2a - 4, a2 - 2a
A. 2a2 - 2 B. 2a - 2 C. 2a2 - 4 D. 2a(a - 2)
Mathematics
Find the inverse of the matrix. 
A. 
B. 
C. 
D. 
Mathematics