If your car gets 28 miles per gallon, how much does it cost to drive 390 miles when gasoline costs $2.90 per gallon?
1 answer:
Answer: x = $25.89
Step-by-step explanation:
This is a two step problem. First we need to determine the number of gallons the car uses to drive the 250 miles:
250/28 ≈ 8.93 gallons
Then we just multiply the number of gallons by the price:
8.93 x 2.90 = $25.90
Alternate solution: Use a proportion. Since 1 gallon costs $2.90 and produces 28 miles, we can set up the following proportion:
2.90/28 = x/250
Cross-multiply and solve:
28x = 725
x = $25.89 (There is a one cent difference due to a rounding error in the first solution. This solution avoids that error.)
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