Solve Nonlinear Systems by Substitution
- $$\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 25 \\x + y = - 7\end{array}$$

Multiple Choice

Solve Nonlinear Systems By Substitution
- $$\begin{array} { l } x ^ { 2 } + y ^ { 2 } = 25 \\x + y = - 7\end{array}$$

A) $\{ ( - 3 , - 4 ) , ( - 4 , - 3 ) \}$
B) $\{ ( 3 , - 4 ) , ( 4 , - 3 ) \}$
C) $\{ ( - 3,4 ) , ( - 4,3 ) \}$
D) $\{ ( 3,4 ) , ( 4,3 ) \}$