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05-01-2016
Mathematics

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

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courtney314 courtney314

05-01-2016

yes because 30/9 is 3.33 and 3.33 * 10 is 33

30+33 is 63 which is close to 57.

without rousing the first step it would be 30+30 which is 60

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