A chemist is mixing a 30% salt solution with a 15% salt solution to make 30 L of a new solution that will contain 20% salt. How much of each of the original solutions should the chemist use?

a reflection across the x axis and a 90 degree rotation left and right.

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %

any of them that add up to 180 degrees.