Question

Khadija is driving on a long road trip. She currently has 12 gallons of gas in her car. Each hour that she drives, her car uses up 1.25 gallons of gas. How much gas would be in the tank after driving for 4 hours? How much gas would be left after t hours?

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Answer 1

17
12 + 1.25 t

The equation to describe this will be
y
=
1
2
+
1
.
2
5
t
y=12+1.25t, where y is the number of gallons which would be in the tank, and t is the number of hours.
When t = 4,
y
=
1
7
y=17 gallons.
So, the gas left in the tank after driving for 4 hours is 17 gallons
The gas left in the tank after driving for t hours is 12 + 1.25 t gallons.