Megan and her twin April are seniors in high school. They worked throughout the summer to have enough money to buy cars, and it cost them every cent they had saved! Now they are trying to figure out how much it will cost them to run through the year. “I have no idea how much I will drive this year,” says Megan. “It’s 5 miles to school, I have soccer practice 3 times a week, which is 2 miles from school, and I probably drive 20 miles on the weekend.”
“I’m about the same as you. Don’t forget in the summer we will probably each drive about a hundred miles a week.” Estimate how many miles Megan and April will each drive in the next 12 months. Just give one estimate for them both as they drive about the same number of miles.
“Great. So how much do you think gas will cost us this year?” asks Megan. “Talk for yourself. My car runs on electricity! I only need to pay $0.12 per kilowatt hour, and it takes about 1 kilowatt hour to drive 3 miles,” says April. Estimate April’s electricity cost for the upcoming year.
“Well, that’s confusing,” replies Megan. “They say my car gets 25 mpg highway and 17 mpg city. We don’t really live in a city, do we? Gas is currently $2.85 a gallon.” Estimate Megan’s gas costs for the upcoming year.
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It's rather vaguely put, but I'd start with miles as
Meghan: m = 52(2*5*5 + 2*3 + 20) = ____
April: a = 52*100
so the cost is
April: $0.12 * a/3
Meghan: $2.85 + m ÷ (17+25)/2
If you can devise a better estimate for Meghan's miles or mileage, then feel free to adjust the numbers.