SOLUTION: A chemist needs 130 milliliters of a 31% solution but has only 17% and 43% solutions availble. Find how many millimiters of each that should be mixed to get the desired solution.

Question 403306: A chemist needs 130 milliliters of a 31% solution but has only 17% and 43% solutions availble. Find how many millimiters of each that should be mixed to get the desired solution.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A chemist needs 130 milliliters of a 31% solution but has only 17% and 43% solutions availble. Find how many millimiters of each that should be mixed to get the desired solution.
------------------------
f = amount of 43%
s = amount of 17%
---------------
f + s = 130 (total solution)
0.43f + 0.17s = 130*0.31 (total of what's in the solution)
-------------
43f + 17s = 4030
s = 130 - f
-------------
43f + 17(130-f) = 4030
26f = 1820
f = 70 ml
s = 60 ml

RELATED QUESTIONS
A chemist needs 110 milliliters of a 37.4% solution but has only 10% and 43% solutions... (answered by josgarithmetic)

a chemist needs 130 milliliters of a 79% solution but has only 29% and 94% solutions... (answered by Earlsdon)

15. A chemist needs 130 milliliters of a 47% solution but has only 35% and 87% solutions... (answered by richwmiller)

a chemist needs 130 milliliters of 59% solution but has only 44% and 83% solutions... (answered by Alan3354)

A chemist needs 90 milliliters of a 78% solution, but has only 43% and 88% solutions... (answered by scott8148)

Solve A chemist needs 150 milliliters of a 43% solution but has only 13% and 58%... (answered by ramkikk66)

A chemist needs 120 milliliters of a 34% solution but has only 7% and 43% solutions... (answered by josgarithmetic,greenestamps)

A chemist needs 160 milliliters of a 22% solution but has only 15% and 31% solutions... (answered by Alan3354)

A chemist needs 130 milliliters of a 65% solution but has only 56% and 95% solutions... (answered by checkley75)