Solve the system of equations using substitution.
A. x = 6, y = 7; x = 7, y = 6
or (6, 7), (7, 6)
B. x = 6, y = -7; x = 7, y = -6
or (6, -7), (7, -6)
C. x = -6, y = -7; x = -7, y = -6
or (-6, -7), (-7, -6)
D. x = -6, y = 7; x = -7, y = 6
or (-6, 7), (-7, 6)
Answer: C
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Use the quadratic formula to solve the equation.
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Please enter your answer as two numbers, separated by a comma.
What will be an ideal response?
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