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If a car travels 350 miles on 20 gallons of gas then how many gallons will be used to travel 875 miles?
Wiki User
∙ 14y ago
You have to solve for gallon per mile, then apply to miles traveled. If the car uses 20 gallons of gas to go 350 miles, then how much gas will it take to go 1 mile? fortunately per is the same thing as a division sign, so divide 20 by 350 and you will get a small weird number (.057142857). this is how many gallons of gas (or rather what fraction of a gallon of gas) it will take a car to go 1 miles. then multiply by 850 to get gallons it would take to do that 850 times.
If you set this up as an algebra problem it will look like this, then you can cross multiply and solve for X.
350 miles / 20 gallons = 850 miles/ X gallons. if you multiply both sides by x, you get 350 miles X/ 20 gallons = 850 miles. Then multiply both sides by twenty which gives you 350 X = 17,000. Then divide both sides by 350 and your left with X = 48.57 gallons of gas.
Wiki User
∙ 14y ago
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