Solve the System by the Substitution Method $$\begin{array} { l } x + y = 10 \\y = x ^ { 2 } - 8 x + 16\end{array}$$

Multiple Choice

Solve the system by the substitution method.
- $$\begin{array} { l } x + y = 10 \\y = x ^ { 2 } - 8 x + 16\end{array}$$

A) $\{ ( 6,4 ) , ( 1,9 ) \}$
B) $\{ ( - 6,16 ) , ( - 1,11 ) \}$
C) $\{ ( 4,6 ) \}$
D) $\{ ( 6,16 ) , ( 1,9 ) \}$