Math Help!!!

posted by Callie

Use cross products to determine which of the following pairs of ratios cannot form a proportion.
A. 1/3*3/9
B. 2/3*4/9
C. 2/3*4/6
D. 1/3*2/6
Is the answer B?

  1. Brady

    Yes B.

    1/3 * 3/9 = 1*9 and 3*3 = 9 and 9
    2/3 * 4/9 = 2*9 and 3*4 = 18 and 12
    2/3 * 4/6 = 2*6 and 3*4 = 12 and 12
    1/3 * 2/6 = 1*6 and 3*2 = 6 and 6

    So B is the correct answer.

    I hope this helps! :)

  2. Callie

    Thank you

  3. Brady

    You're welcome, Callie.

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