Question

Charlie bought three cantaloupes
for $7. How many
cantaloupes can he buy with $28?

Answer 1

Charlie can buy 12 cantaloupes with $28

Explanation:

If he is able to buy 3 cantaloupes with $7, the price per cantaloupe can be determined by dividing ou money spent by the number of cantaloupes:

$7/per 3 cantaloupes, this will give us a cost of $7/3 per cantaloupe.

With our single price, we can take the $28 we have and divide in by the unit price for the cantaloupes to determine how many we can buy:

$28/(7/3)=12 cantaloupes

Answer 2

Hi!

To solve this, we can set up a proportion.

First, we will make two ratios that we can set equal to each other.

If Charlie bought three cantaloupes for $7, our ratio would be 3:7 or
`(3)/(7)`.

Now, we want to know how many cantaloupes for $28, so our ratio would be x:28 or
`(x)/(28)`, where 'x' is the number of cantaloupes.

Now, we set those fractions equal to each other.

-------------------------------------------------------------------------------------------------------------

`(x)/(28) = (3)/(7)`

Now, we can use cross-products to solve for x.

`7x = 84\\`

Divide both sides by 7

`x=12`

Therefore, he can buy 12 cantaloupes with $28.

(See BELOW if you do not know what cross products are)