Answer:
B
Step-by-step explanation:
YOU JUST ADD THE 2 FUNCTIONS TOGETHER THEN COMBINE LIKE TERMS
note that (f + g)(x) = f(x) + g(x)
= [tex]3^{x}[/tex] + 10x + 5x - 3 ← collect like terms
= [tex]3^{x}[/tex] + 15x - 3 → B
