WORd problems

Question

Theodore needs to mix a 10% alcohol solution with a 40% alcohol solution to create 100 millileters of a 31% solution. How many millileters of each solution must Theodore use?

Answer: Theodore must mix
_____millileters of 10% solution and
_____millileters of 40% solution.

Answer 1

Ashley, this is very similar to your previous post.

You should review it and see how these are done.

 

If you use x mL of 10% solution, you use (100-x)mL of 40% solution

to end up with 100mL of  31% solution.  Your equation is:

 

.1x + .4(100-x) = .31(100)

 

Solve for x to determine the amount of 10% solution.

Then 100-x will be the amount of 40% solution.