So you need to divide. Miles per gallon means the miles is in the numerator and gallons is the denominator. You may benefit from this article, which I wrote.
C* = d/V = 389 mi / 18.6 gal = 20.91 miles per gallon <---------------------------------
He got 20.9 miles per gallon.
20.9 mpg
You can't calculate that, since you don't know how many miles she drove, and there is not information to figure it out.
27.8 Gallons.
He needs to know how many gallons the tank holds. Then the can divide the amount of miles by the amount of gallons, to find out how many miles per gallon he gets.
800 miles @ 25 miles/gallon = 800/25 = 32 gallons.32 gallons @ 4 dollars/gallon = 32*4 = 128 dollars.800 miles @ 25 miles/gallon = 800/25 = 32 gallons.32 gallons @ 4 dollars/gallon = 32*4 = 128 dollars.800 miles @ 25 miles/gallon = 800/25 = 32 gallons.32 gallons @ 4 dollars/gallon = 32*4 = 128 dollars.800 miles @ 25 miles/gallon = 800/25 = 32 gallons.32 gallons @ 4 dollars/gallon = 32*4 = 128 dollars.
Estimate 30 mpg
20.9 miles per gallon 389 / 18.6 = 20.9140
Your got about 18 miles per gallon (17.96875).
20.9 mpg
miles=458 gallons=19.2 miles per gallon=miles/gallon 458/19.2=23.854 mpg
15 mpg (miles per gallon). The key to this 'word problem' is understanding that "miles to the gallon" or more commonly, 'miles per gallon', means DIVISION. So, 300 miles per 20 gallons means: (300 miles) / (20 gallons) = 15 miles per gallon.
30 gallons. Simple really.
Divide the miles by the gallons used. 315.5/11.4 = 27.6754386
343.8 miles / 9 gallons = 38.2 miles per gallon 9 gallons / 343.8 miles = 0.0 gallons per mile (to the nearest tenth). Actually, the consumption is 0.026 gallons per mile.
You can't calculate that, since you don't know how many miles she drove, and there is not information to figure it out.
He travelled 31.5 miles per gallon.
27.8 Gallons.
20mi = 1gal 555mi x (1gal/20mi) = 27.27gal