Question 1128868
nickels: n
quarters: q
^^^
n+q = 33 and therefore n = 33-q
0.05n + 0.25q = 4.25 substitute for n: 
0.05(33-q) + 0.25q = 4.25
1.65 - 0.05q + 0.25q = 4.25
0.20q = 2.60
q = 13 
So Travis has 13 quarters and 33-13=20 nickels