First let’s establish a few things, The first car can travel 300 miles with 20 gallons of gas, if 14 gallons of gas costs 49.49 then for ever gallon of gas Sam is paying 3 dollars and 53.5 cents. That means for 20 gallons, Sam will need around 71$ for the entire trip if he uses the first car.
When writing a decimal, the numbers to the left of the decimal are whole numbers greater then or equal to 1. The numbers to the right of the decimal are numbers less then 1.
if u know 5/8 = 0.625, then 4 5/8 = 4.625
To solve this proportion:
Simplify 3/6, it reduces to 1/2
Then do the Criss cross method
1d = 7 ×2
d=14
Hope it helps!