For the Pair of Functions, Perform the Indicated Operation $f ( x ) = 7 - 8 x , g ( x ) = - 4 x + 8 \quad$

Multiple Choice

For the pair of functions, perform the indicated operation.
- $f ( x ) = 7 - 8 x , g ( x ) = - 4 x + 8 \quad$ Find $( f + g ) ( x )$

A) $3 x$
B) $- 12 x + 15$
C) $- 4 x + 15$
D) $- 4 x + 7$