The glass tank in karen's car holds 15 gallons of gas. her car gets between25 and 30 miles to the gallon. if karen fills up the gas tank and then driver until she runs out of gas, what is the least number of miles she can drivr?

So this problem is asking for the difference in the total amount of gas in the tank and the amount of gas consumed. You have the total amount of gas–15 gallons. You have the information in the problem to find the amount of gas consumed. The car can go 32 miles before consuming a full gallon of gas and it traveled 384 miles. So if you divide the 384 miles by 32 miles per gallon, you are left with the gallons consumed.  Once you have this number, you can subtract it from 15 gallons–the total amount of gas in the tank–to get how much gas is left.