Algebra word problem

Algebra word problem

Postby Guest » Thu Feb 07, 2019 11:26 pm

After checking that the gas tank of a car is filled to its capacity, a person proves the following:
Travelling d miles within a city, the number of gallons of gas left in the tank can be given by the function g(d)=15-d/20.
He can cover 3 more miles per gallon of gas on a highway within the city.
What is the maximum distance the car can travel on the highway with the tank filled to its capacity?
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