Question

Connie has to solve the following problem

5 boxes of cereal costs $12.50. How much will 18 boxes cost
Choose EVERY proportion Connie could use to solve this problem
​

Answer 1

$45

Explanation:

$12.50÷5=$2.50

$2.50×18=$45

or

12.50/5=n/18

Answer 2

Answer: Cost of 18 boxes is $45.

Explanation:

Since we know that

Cost of 5 boxes of cereal = $12.50

We will use "Unitary method":

Cost of 1 box of cereal is given by

`(12.50)/(5)\\\\=\$2.5`

So, Cost of 18 boxes would be

`\$2.5* 18\\\\=\$45`

Hence, cost of 18 boxes is $45.