Question

You have 30 quarters. You find ​20% more quarters in your room. Then you go shopping and spend ​25% of the total number of quarters. Write an expression to represent the total number of quarters you take with you shopping.​ Calculate, in​ dollars, the amount of money you have left.

Answer 1

The expression for the total number of quarters taken shopping is 30 + 0.2 x 30 = 36 quarters. The amount of money you have left is $27 x $0.25 = $6.75.

Step-by-step explanation:

To calculate the total number of quarters you take with you shopping, you need to find 20% of the initial number of quarters (30 quarters) and add it to the initial number of quarters.

Expression: 30 + 0.2 x 30 = 30 + 6 = 36 quarters

To calculate the amount of money you have left, you need to find 25% of the total number of quarters and subtract it from the total number.

Expression: 36 - 0.25 x 36 = 36 - 9 = 27 quarters left

Since each quarter is equal to $0.25, the amount of money you have left is $27 x $0.25

= $6.75.