Find $( f \circ g ) ( x )$ Where $f ( x ) = 6 x + 9$

Multiple Choice

Find $( f \circ g ) ( x )$ where $f ( x ) = 6 x + 9$ and $g ( x ) = x - 7$ .

A) $6 x + 2$
B) $6 x - 33$
C) $6 x ^ { 2 } - 33 x - 63$
D) $6 x ^ { 2 } - 42 x + 9$
E) $7 x + 33$