Alfred has twelve coins in his piggy bank. Some of the coins are quarters, some are nickels, and he has a total of $3.15. Which system of equations can be used to determine how many quarters, x, and how many nickels, y, he has?

Please don't answer unless you know the answer.

My guy 12 coins, it takes 12 quarters to make $3. It would have to be 15 coins for it. 4 quarters = one dollar. 4 quarters x 3 would equal $3, but that’s 12 coins. Then 3 nickels after that. So Alfred has to have 15 coins if it’s only nickels and quarters.

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Alfred has twelve coins in his piggy bank. Some of the coins are quarters, some are nickels, and he has a total of $3.15. Which system of equations can be used to determine how many quarters, x, and how many nickels, y, he has? Please don't answer unless you know the answer.

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Alfred has twelve coins in his piggy bank. Some of the coins are quarters, some are nickels, and he has a total of $3.15. Which system of equations can be used to determine how many quarters, x, and how many nickels, y, he has?

Please don't answer unless you know the answer.