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Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.
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1) prove that 731^3β631^3 is divisible by 100 2) prove that 99^3β74^3 is divisible by 25
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Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.
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Josh got to school at half past 8.show this time on the clock...
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