Question

There are 36 coins in a bag, all are quarters and dimes. There are half as many dimes as quarters and the value of the coins in the bag totals $7.20.
How many dimes (d ) are in the bag?



How many quarters (q ) are in the bag?

Answer 1

There are 12 dimes, and 24 quarters in the bag. 
0.25x24=6
0.10x12=1.2
6+1.2=7.2