In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2:5. If there are 42 coins in all, what is the value of the dimes?
Phil has x quarters, y dimes, and z nickels and nothing else. Which of the following expressions represents the amount of money that Phil has, in dollars?
A jar contains 30 coins, of which 20 are nickels and 10 are dimes. If 7 coins are removed, how many nickels are left?
(1) More nickels are removed than dimes.
(2) The remaining coins in the jar are worth $1.55.