Some engies require oil to be mixed with gasoline. for every gallon of gas used, 4 ounces of oil should be added. how much gas is needed if 12 ounces of oil are used?

1 gallon of gas requires 4 ounces of oil
X gallons of gas require 12 ounces of oil
1/4 = x/12
4x = 12
x = 12/4
x = 3
.
Therefore , 3 gallons of gas are needed.

Question 1:

You would need 4 cups of milk, and 12 tablespoons of chocolate powder for 4 glasses of chocolate milk.

If your brother made his chocolate milk using 2 cups of milk and 3 tablespoons of chocolate powder, his drink would be less chocolatey than yours.

Question 2:

The ratio to boys and girls in the classroom is 15/10 or 10/15

Question 3:

It takes Joshua 6 minutes and 40 seconds to run 1 mile,

It takes Joshua 33 minutes and 20 seconds to run 5 miles

And it takes Joshua 16 minutes and 40 seconds to run 2.5 miles.

;)