For the Given Functions F and G, Find the Requested $f ( x ) = 7 x - 8 ; g ( x ) = 2 x - 7 ; \quad$

Multiple Choice

For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.
- $f ( x ) = 7 x - 8 ; g ( x ) = 2 x - 7 ; \quad$ Find $f - g$ .

A) $( f - g ) ( x ) = 5 x - 15 ; ( \infty , 3 ) \cup ( 3 , \infty )$
B) $( f - g ) ( x ) = 5 x - 1 ; ( \infty , \infty )$
C) $( \mathrm { f } - \mathrm { g } ) ( \mathrm { x } ) = 9 \mathrm { x } - 15 ; ( \infty , 1 ) \cup ( 1 , \infty )$
D) $( f - g ) ( x ) = - 5 x + 1 ; ( \infty , \infty )$