With my question it is the millers shower uses 25 gallons of water for a 10 min shower. now how many gallons of water would be used for a 6 min shower

The Millers need 15 gallons of water for 6 minutes.

Lets start by finding how much water is needed for 1 min shower. 

25 gallons of water is used for 10 min shower:

10 mins = 25 gallons 

To find 1 min shower, we will divide the 25 gallons of water by 10. 

10 mins = 25 gallons            ← Divide by 10 on both sides
÷ 10           ÷ 10
1 min = 2.5 gallons

Now that we know the Millers need 2.5 gallons for every 1 minute of shower, we can find 6 minutes of shower by multiplying by 6.

1 min = 2.5 gallons         ← Multiply 6 on both sides
   x6           x6
6 min = 15 gallons


The Millers need 15 gallons of water for 6 minutes.