Answer:
a.
Step-by-step explanation:
x=4
3(2)=6
6(4)=24
24 is your answer!
Answer:
Composition: 
Domain = {
}
Step-by-step explanation:
Given

The requested composition becomes:

Then the Domain consists of all Real x-values for which the function is defined. In this case, the function is defined for all x-values for which the square root is defined, that is all x values for which:
(so the square root is defined in the Real number system)
This means 
The Domain is then all the Real x-values such that 
Look at the picture please.
If you don’t understand my hand writing please comment.
Answer:
(x)=3x^2−12x+16
Answer- =3x2−12x+16
Step-by-step explanation:
Hope this helps :)