If the tomatoes are 6 for $4 how much will 15 tomatoes cost

15 tomatoes costs $10.

First, we need to convert this to a common factor.

The GCF of 6 and 15 is 3.

How do we go from 6 to 3?

Divide by 2.

6 = $4

Divide both by 2

3 = $2

How do we go from 3 to 15?

Multiply by 5

3 * 5 = 15

$2 * 5 = $10