Mathematics, 03.02.2020 13:52 stina2021
There are two machines that produce aluminum cans. the newer machine can produce 7200 cans in 200 minutes. it takes the older machine 300 minutes to produce that same amount. if the two machines work together, how long will it take to produce 7200 cans?
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Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.
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