Given f(x)=10x+5 and g(x)=3x+6 then what is (f+g)(−1)) ?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Could somebody me with this radical simplification?