Answer:

Step-by-step explanation:
and
does not have any common factor except for 
<span>I believe its 4.5
I could be wrong though</span>
Answer:
7. 
8. 
Step-by-step explanation:
We are given two function, f(x) and g(x).
We want to find their addition and their subtraction, and we do this combining like terms.
The functions are:


7. Find (f+9) (x)

So

8. Find (f - g) (x)

So

We have the following function:
N (k):
Where, the indepent variable is k
The dependent variable is N
For the function:
k (n):
the independent variable is n
The dependent variable is k
Thus,
N (12) = 4
k (4) = 12
Answer:
TRUE
option A