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21-06-2017
Mathematics

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The ratios in an equivalent ratio table are 3:12, 4:16, and 5:20. If the first number in the ratio is 10, what is the second number? Justify your reasoning.

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musiclover10045 musiclover10045

21-06-2017

the 3 ratios given, the bottom number is the top number times 4

3*4=12

4*4=16

5*4=20

so if the top number is 10 the bottom will be 40

10*4 = 40

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lroland lroland

21-06-2017

10:40 the ratios are increased by multiples of 4.

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