SOLUTION: if a car driven 45 miles on 2 gallons of gas, how many gallons of gas will it take to travel 315 miles?

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Question 198872: if a car driven 45 miles on 2 gallons of gas, how many gallons of gas will it take to travel 315 miles?
Answer by jim_thompson5910(21685) About Me  (Show Source):
You can put this solution on YOUR website!
Since 45 miles is to 2 gallons of gas and 315 miles is to "x" gallons, this means we have the ratio: 45%2F2=315%2Fx



45%2F2=315%2Fx Start with the given ratio


%2845%2F2%29%2Ax=315 Multiply both sides by x


45%2Ax=315%2A2 Multiply both sides by 2


45%2Ax=630 Multiply


x=630%2F45 Divide both sides by 45


x=14 Simplify



So our answer is x=14 which means that it takes 14 gallons of gas to go 315 miles.