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26 November, 09:36

Which pair of ratios is proportional? A. 5:7 and 25:35 B. 6:9 and 18:36 C. 9:18 and 16:36 D. 35:120 and 75:250

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  1. 26 November, 11:32
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    One way is to make into fracitons and simplify

    A. 5/7=25/35?

    yes, true

    B. 6/9=18/36?

    no

    C. 9/18=16/36?

    no

    D. 35/120=75/250?

    no

    another way is

    if a/b=c/d, then (ad) / (bc) = 1 or ad=bc

    A is answer
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