Use elimination by substitution to find the solution for the following system.
A. x = 10, y = 5
B. x = 10, y = 9
C. x = 9, y = 6
D. The system is inconsistent.
Answer: C
Mathematics
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A. 
B. 
C. 
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A. y = -3 cos 
B. y = -3 sin (2x)
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