How far could one travel?

Question

If you have a vehicle that holds 31 gallons of gas and gets 14 miles per gallon in city. How many 4 mile in city trips could one make using all 31 gallons of gas?

Answer 1

The point of this excercise is to get you to learn how to figure it out yourself.

You have 31 gallons, and 14 miles/gallon.  You are trying to figure out how many miles you can go.  

Multiply gallons by miles/gallon, and you cancel out the gallons and are left with just the miles.  

Then you have miles/trip, and you are trying to figure out how many trips you can do.  So you DIVIDE miles by miles/trip, which cancels out the miles.  (because it's like multiplying, except with the miles/trip flipped upside down)

The number you're left with is the number of trips you could take.