Question

find fog if F(x)=2x-1 and g(x)=x+2

Answer 1

f o g is the composition of the functions
and it stands for f(g(x)

Answer 2

F(x) can be thought of as inputting an arbitrary value x . Similarly, just consider g(x) as an arbitrary value which is equal to x+2 and which you will be inputting into the function 2x-1 to get fog or f(g(x) as Zale mentioned.

Answer 3

thanks