Solve Nonlinear Systems by Substitution
- $$x + y = 7$$

Multiple Choice

Solve Nonlinear Systems By Substitution
- $$x + y = 7$$
$x ^ { 2 } + y ^ { 2 } = - 16 y + 109$

A) $\{ ( 13 , - 6 ) , ( 2,5 ) \}$
B) $\{ ( - 6,13 ) , ( 5,2 ) \}$
C) $\{ ( 1,6 , ( 12 , - 5 ) \}$
D) $\{ ( 6,1 ) , ( - 5,12 ) \}$