Answer
y = 3t
Explanation:
There is no sample provided, but assuming the equation for Adrian's car is y = 3t, where t represents the number of gallons of gas, we can compare the efficiency of their cars.
Caroline's car can drive y miles for every t gallons of gas, so her gas mileage is y/t.
Adrian's car can drive y miles for every 3t gallons of gas, so his gas mileage is y/(3t).
To compare their gas mileage, we can set the two equations equal to each other:
y/t = y/(3t)
Simplifying this equation, we can multiply both sides by 3t to get:
3y = y
This means that Adrian's car is three times more fuel efficient than Caroline's car. In other words, Adrian can drive three times as far as Caroline with the same amount of gas.