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13-03-2017
Mathematics

contestada

The ratio of red collars to black collars sold at one store is 9 to 10. in one month 30 black collars were sold. is 57 a reasonable number for the total number of red and black collars sold that month. explain

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Аноним Аноним

13-03-2017

27 red collars. 57-30=27

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