Question 95125
.25Q+.10(Q+4)=35.40
.25Q+.10Q+4=35.40
.35Q=35.40-.40
.35Q=35
Q=35/.35
Q=100 NUMBER OF QUARTERS. 
100+4=104 DIMES.
PROOF
.25*100+.10*104=35.40
25.00+10.40=35.40
35.40=35.40