Question

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?

Answer 1

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.

Answer 2

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.

Answer 3

`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