contestada

Please help!!!
For f(x)=-x+8, which statement is true?
A. F(x+k)=f(x)+k
B. F(x-k)=f(x)-k
C. F(x+k)=f(x)+f(k)
D. F(x-k)=f(x)+k
I need my answer ASAP please.
You get max amount of points I can give