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24 August, 23:03

Homework: Section 1.2 Applications Linear

Score: 0 of 1 pt

8 of 10 (7 complete)

1.2.31

How many quarts of pure antifreeze must be added to 4 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?

quart (s) of pure antifreeze must be added.

(Round to the nearest tenth as needed)

+4
Answers (1)
  1. 24 August, 23:27
    0
    q = 0.5 quarts of 100% antifreeze

    Step-by-step explanation:

    q = quarts of pure antifreeze

    Set this up as a weighted combination of the mixtures.

    (100%) (q) + (10%) (4) = (20%) (q + 4)

    100q + 40 = 20 (q + 4)

    5q + 2 = q + 4

    4q = 2

    q = 0.5 quarts of 100% antifreeze
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