Solve the system by the substitution method.x2 + y2 = 25 x - y = 1
A. {(4, -3), (3, -4)}
B. {(-4, -3), (-3, -4)}
C. {(-4, 3), (-3, 4)}
D. {(4, 3), (-3, -4)}
Answer: D
Mathematics
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?
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