Question

You have Q quarters, D dimes, and N nickels. You then pay for candy with 4 quarters, 5 dimes, and 6 nickels. Write an expression for how much money you have in cents after the purchase.

Answer 1

In cents, before you buy the candy, you have 25q, + 10d +5n. The numbers represent the amount of money each coin is worth, and the variable represents how many of each coin there are.

The amount you spend on candy: 4(25) + 5(10) + 6(5) = 180.

Therefore, after you purchase the candy, you have 180 - 25q + 10d + 5n.

I hope this helps!