Question

The double number line shows that \[4\] bottles of water cost \[10\] dollars at a music festival. A double number line with 6 equally spaced tick marks. The line labeled Bottles, reads from left to right: 0, three unlabeled tick marks, 4, an unlabeled tick mark. The line labeled Cost, dollars, reads from left to right: 0, three unlabeled tick marks, 10, an unlabeled tick mark.

Answer 1

The cost of 3 bottles of water is $7.5

Using the cost ratio given :

• 4 bottles = $ 10

To obtain the cost of 3 bottles, we create the relationship thus ;

4 = 10

3 = x

cross multiply

4x = 10 × 3

4x = 30

divide both sides by 4

4x/4 = 30/4

x = $7.5

The cost of 3 bottles is $7.5

Complete Question

The double number line shows that \[4\] bottles of water cost \[10\] dollars at a music festival. A double number line with 6 equally spaced tick marks. The line labeled Bottles, reads from left to right: 0, three unlabeled tick marks, 4, an unlabeled tick mark. The line labeled Cost, dollars, reads from left to right: 0, three unlabeled tick marks, 10, an unlabeled tick mark.

Based on the ratio, How much does 3 bottles of water cost?