In order to solve this kind of problem, we must find the difference between two negative numbers describing elevation. Although when you have 2 negative numbers in a subtraction-elevation problem, the elevation difference won't be negative... It would be positive. -56 - (-14) would usually equal -42 feet but that would just describe a regular negative subtraction problem, so it becomes 42 feet. This answer is positive since it describe the distance between these integers.
1 gallon is equal to 34 miles so 1g = 34 d it would take 17 gallons of gas to travel 578 miles
The first step you would take would be multiplying 5x2
