Posted by lisa on Sunday, January 23, 2011 at 10:37pm.
A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?

algebra  helper, Sunday, January 23, 2011 at 11:03pm
x = liters of 3% solution
3  x = liters of 10% solution
.03x = value 3% solution
.10(3  x) = value 10% solution
3 = liters of 7.9% mixture
.079(3) = 0.237 = value 7.9% mixture
.03x + .10(3  x) = 0.237
Solve for x, which is number of liters of 3% solution.
(3  x) = number of liters of 10% solution
Answer This Question
Related Questions
 algebra  A dehydrated patient needs a 3.82% saline IV. Unfortunately, the ...
 algebra  A dehydrated patient needs a 7.9% saline IV. Unfortunately, the ...
 algebra  A dehydrated patient needs a 7.9% saline IV. Unfortunately, the ...
 algebra  A dehydrated patient needs a 2.6% saline IV. Unfortunately, the ...
 Intermediate Algebra  A dehydrated patient needs a 6.4% saline IV.Unfortunately...
 Algebra  A dehydrated patient needs a 3.82% saline IV. Unfortunately, the ...
 algebra  Nurse erika needs to prepare 12 liters of a 10% saline solution. The ...
 algebra  Nurse erika needs to prepare 12 liters of a 10% saline solution. The ...
 math  Cecilia created 2.5 liters of a chemical mixture for an experiment. ...
 college math  How many liters of water should be evaporated from 110 liters of ...
More Related Questions