romeliasantos9p10vro romeliasantos9p10vro

20-12-2017
Mathematics

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If the teacher assistant can grade papers in one hour and with the teacher's help they finish in 20 minutes how many minutes would it take the teacher to grade the papers?

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dakodadodge dakodadodge

20-12-2017

it will take the teacher 1 hour

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