The first third terms are n^2, -n, and -5. There is not fourth.
Explanation: To solve this, we would first distribute n(n-1) by doing n x n - n x 1. That gives us n^2 - n. Now, we add back the -5 which would be n^2 - n - 5.
It is A because when you add the amount of your purchases and you subtract it from 102.35. You get a negative number. Then you add that negative number to 25 and 24.75.
, which is equal to 
, so six is the answer.