If $f ( x ) = 15 x + 7$ And $g ( x ) = x ^ { 2 } - 5 x$

Multiple Choice

If $f ( x ) = 15 x + 7$ and $g ( x ) = x ^ { 2 } - 5 x$ , find $( f + g ) ( x )$ .

A) $( f + g ) ( x ) = 15 x ^ { 2 } - 75 x + 7$
B) $( f + g ) ( x ) = 15 x + 7 + g$
C) $( f + g ) ( x ) = x ^ { 2 } + 10 x + 7$
D) $( f + g ) ( x ) = 15 x ^ { 3 } - 68 x ^ { 2 } - 35 x$