Answer:
Mr. Hughes can drive 300 miles with 12 gallons of gas.
Step-by-step explanation:
First you want to find how far he can travel with one gallon to do that you divide 500 by 20 to get 25. So he can drive 25 miles for one gallon.
Now all you have to do is multiply 25 by 12 to get 300.
Mr. Hughes can drive 300 miles with 12 gallons of gas.
Hope that helps and have a great day!