400. Just add a zero when you're dealing with tens
Answer:
y-8+8
Step-by-step explanation:
Associative Property of Addition hope this helps
<u>Answer:</u>
The correct answer option is D. 
<u>Step-by-step-explanation:</u>
We are given the following two functions:
and

We are to find
so we will subtract the function g from function f, arrange the like terms together and combine them like shown below to get:



Therefore,
is equal to
so the correct answer option is D.
.