Algebra

posted by Anonymous

A certain paint is to be mixed with 3 parts yellow to 2 parts blue. Twelve gallons of mixed paint are needed.

How many gallons of blue must be used?

  1. John

    This is a proportional reasoning question.
    The proportion is blue/total paint=blue/total paint
    so the question gave you
    2blue/(5 total from 2blue+3yellow) and you are asked How many blue for 12 gallons.
    So 2/5=BLUE/12
    (12)[2/5]=12[Blue/12]
    and solve : )

  2. Henry

    X gal. of blue.
    3x/2 = 1.5x gal. of yel.

    x + 1.5x = 12.

  3. MsPi_3.14159265

    Yes, both ways have the same answer : )

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