Solve the system by the substitution method.xy = 90x2 + y2 = 181
A. {(9, 10), (-9, -10), (9, -10), (-9, 10)}
B. {(-9, -10), (-10, -9), (-9, 10), (-10, 9)}
C. {(9, 10), (-9, -10), (10, 9), (-10, -9)}
D. {(9, 10), (10, 9), (9, -10), (10, -9)}
Answer: C
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, find (-3)B.
A. 
B. 
C. 
D. 
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