Question

Writing proportions

5 rubber stamps cost $9.70.
Which equation would help determine the cost of 11 rubber stamps?

Answer 1

5/9.70 * 11/x

x=$21.34 for 11 stamps

Explanation:

5/9.70 * 11/x

Cross multiply so 5x and 9.7x11

5x=106.7

Divide by 5

x=$21.34 for 11 stamps