Answer:
Identity function
Step-by-step explanation:
We are given the following in the question:
Let f(x) be a function.
Then, inverse of f(x) can be written as:

The composition function of the function and the reverse function can be found as:

which is an identity function.
Thus, the correct answer is
The identity function, f(x) = x, is formed by the composition of a function and its inverse.
You have 6 variables with 2 levels each. Thus 2*2*2*2*2*2 or 2^6 or 64.
Step-by-step explanation:
6-15x-6-10x
put the like terms together and it's now -15x-10x+6-6
-25+6-6
=-25