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On the first day of school, the percentage of boys in a particular class is 60%. During the school year, six girls move away, and are replaced in the class by six boys; this makes the class roster 75% boys. Find the number of boys and girls in the class on the first...
Write the proportion that is equivalent to the given statement: If Maria hit 8 home runs in 15 softball games, then she should hit 24 home runs in 45 games.
A cement manufacturer buys limestone for $3 per pound and a special shale mix for $5 per pound. The two ingredients are mixed into a 100-pound compound that cost $4.25 per pound. How much limestone and how much of the shale mix should be added into the compound?
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