Solve the System by the Substitution Method $$\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 85 \\x + y = - 13\end{array}$$

question 102

Multiple Choice

Solve the system by the substitution method.
- $$\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 85 \\x + y = - 13\end{array}$$

• A) \(\{ ( - 6,7 ) , ( - 7,6 ) \}\)
• B) \(\{ ( 6,7 ) , ( 7,6 ) \}\)
• C) \(\{ ( - 6 , - 7 ) , ( - 7 , - 6 ) \}\)
• D) \(\{ ( 6 , - 7 ) , ( 7 , - 6 ) \}\)

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