8 - rotation
9- rotation
10- y- axis
Again take the variable to be x
x^12-15
I don’t know number 9 but 10 is ✖️6
The domain of a(x) is all of R. The domain of b is the range where

. We can calculate the composition boa by changing in the expression for b, every x with a(x). Hence, boa(x)=

=

. Again for a function with a root to be defined, we need that the expression under the square root has to be positive. Hence, 3x-3

0.Thus, the set where this holds is

. This is also the domain of the function boa(x).