Answer: (c)
Step-by-step explanation:
Given

Here, 
To get
, replace
in
by 

Using
and
it can be concluded that the domain of
is all real numbers except 0.
Therefore, its domain is given by

Option (c) is correct.
Answer:
-40x-15
You multiply using the distributive property.... Hope it helped :)
As the input goes up by 3, the output goes down by 1.
Answer:
https://www.mathsisfun.com/adding-decimals.html
This has an explanation.
Midpoint formula = (-9 + 6) / 2 = -3/2