Question

A dehydrated patient needs a 6.1% saline IV. Unfortunately, the hospital only has bags of 5% and 7% saline solutions. How many liters of each of these solutions should be mixed together to yield 2 liters of the desired concentration?

Answer 1

not quite..... x+y = 2, 5x+7y = (6.1)(2)

Answer 2

now i need to solve it

Answer 3

thats where i get confused

Answer 4

yes use substitution...........y=2-x............plug it in for y.............5x+7(2-x) = 12.2

Answer 5

so thats the answer

Answer 6

whats the answer? .................the goal is to find the number of liters that must be mixed together, you need to have x = ? and y = ?, before you're done

Answer 7

x=5and y =7

Answer 8

does 5+7 = 2 ?

Answer 9

no

Answer 10

sorry i gotta go............work on solving this equation for x: 5x+7(2-x) = 12.2

Answer 11

thanks