Y= 18 gallons-2(h)
y is what you're trying to find out and since there are 18 gallons in the tank after every hour you would have 2 less gallons. So, you can multiply how many hours he's been driving by the 2 gallons and subtract it from 18
        
             
        
        
        
5/6 - 1/5 = 19/30 = 0.633
Hope this helped you! Please mark brainliest if this helped you at all and have a wonderful rest of your day!
 
        
                    
             
        
        
        
Answer:
x = 3/7y - 13/7
Step-by-step explanation:
7x-3y=-13
   +3y   +3y        Add 3y to both sides
7x = 3y - 13       Divide both sides by 7
x = 3/7y - 13/7
 
        
                    
             
        
        
        
Answer:
Volume =   πr2h
=  π×52×9
=  225π
=  706.85 inches3
Step-by-step explanation: