It costs $7.50 to enter a petting zoo. Each cup of food to feed the animals is $2.50. If you have $12.50, how many cups can you buy?

3 Answers
May 30, 2017

You can buy 5 cups of food to feed the animals before running out of money.

Explanation:

To do this simply, we can just count up how many cups we can buy.

"starting balance" = $12.50

"after cup " 1 = 12.5 - 2.5 = color(blue)($10.00

"after cup " 2 = 10 - 2.5 = color(blue)($7.50

"after cup " 3 = 7.5 - 2.5 = color(blue)($5.00

"after cup " 4 = 5 - 2.5 = color(blue)($2.50

"after cup " 5 = 2.5 - 2.5 = color(blue)($0.00

From this, we can see that after buying the 5^"th" cup, the buyer is out of money, so that means that you can buy 5 cups of food to feed the animals before running out of money.

May 30, 2017

Pay the entry fee and use the remaining money to buy 2 cups of food.

Explanation:

The entry fee is $7.50 and once you have paid that, you can use the remaining money to buy cups of food.

Pay the entry fee: $12.5-$7.5 = $5

$5 div $2.50 = 2 cups of food can be bought.

May 30, 2017

2 " Cups"

Explanation:

You start with $12.50, and have to give $7.50 as an entry fee(you must have no friends then) so, you'll be left with,
$12.50
-$07.50
---
$5.00
Each cup costs $2.50, so,
1"st" cup
$5.00
-$2.50
---
$2.50
2"nd" cup
$2.50
-$2.50
---
$0.00
Therefore, 2 cups
And, no money in your pocket