Answer:
when you have something like f(x)=... that means
f means function
and every time you see an x or the variable in the parenthesis you plug in for that so it's f(x) =3x+1 then f(2)= 3x+1 every time you see x you plug in 2
Answer:
5
Step-by-step explanation:
Hence it is correct.. thanks for points.
I believe it's the 3rd one
Answer:
d
Step-by-step explanation:
