Answer:
and 
Step-by-step explanation:
First of all, even if the system is of 4th degree, by looking at the shape of the equations I am expecting up to 2 solutions.
The easiest way to solve it, since both equation are in the form y= something, is to equate both RHSs.

which tells us that either
or 
Now we can replace these value of x in one of the two to finish our work: 

The answer to your question is "payday lender"
Answer:
1a: f(-2) means substituting -2 for x
1b: 65
I don't know the second one