ANSWER
C.The number of quarters and the number of nickels Sam has.
Step-by-step explanation
We have that the system of equations representing the situation is:
0.25q + 0.05n = 4.30
q + n = 26
The solution to the system of equations (q, n) will represent the number of quarters and nickels that Sam has.
This is because the sum of q and n is 26 and we are told that Sam has 26 coins.
Therefore, we can conclude that (q, n) represents the number of quarters and nickels that Sam has.