You have 15 coins, that are quarters and dimes. The total value of the coins is $2.40. How many quarters and how many dimes do you have?

6 quarters, 9 dimes

Step-by-step explanation: So if one quarter equals 25 cents, and one dime equals ten the answer would be 9 dimes and 6 quarters. I know that you can fit 9 quarters in 2.40, but we have to add the dimes too and have 15 coins. So we now know that we can fit 6 quarters in 2.40 plus dimes. So 6*25=150, and we know that 6 quarters=1.50.  2.40-1.50=90, so 90 divided by ten equals 9.So, 6 quarters and 9 dimes.

all it means is function 3