Solve the System by the Method of Your Choice $$\begin{array} { l } y = - 4 x + 9 \\20 x + 5 y = 45\end{array}$$

Multiple Choice

Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.
- $$\begin{array} { l } y = - 4 x + 9 \\20 x + 5 y = 45\end{array}$$

A) $\varnothing$
B) $\{ ( 0,9 ) \}$
C) $\{ ( x , y ) \mid 4 x + y = 9 \}$
D) $\{ ( 0,0 ) \}$