915/16mpg = 57.1875 gallons
57.1875 x 3.10 = $177.28
57.1875/ 23 = 2.49 tanks of fuel
How many miles per gallon does the car get?
We cannot answer this because.... you forgot to include the miles per gallon figure ! A car that only has a 15-gallon fuel tank could drive just as far as the one in your example - if it did more miles to the gallon !
65 miles to the gallons it holds 4.5 gallons in the tank.
miles ÷ (miles/gallon) * ($/gallon) = miles * (gallons/mile) * ($/gallon) = (miles * gallons * $) / (miles * gallons) = $ So divide 560 mi by the vehicle's fuel economy, then multiply the quotient by the fuel cost.
Jace's car used 14 gallons to travel 378 miles. How far can he travel on 13 gallons?
That is 26 miles per gallon.
900 miles / 50 miles/gallon = 18 gallons
480 miles @ 20 miles per gallon = 24 gallons needed 24 gallons @ $3.75 per gallon = $90
About 16.8 gallons. 420 miles / 25 miles per gallon = 16.8 gallons
2100 miles at 21 miles per gallon = 2100/21 gallons = 100 gallons. 100 gallons at 3.80 per gallon = 100*3.80 = 380
1,600 miles at 16 miles per gallon = 100 gallons.100 gallons x $4.50 = $450.00
58.823 Gallons