There are two word problems that are giving me alot of trouble for an assignment that I have to do.
A 50% saline solution mixed together with a 30% saline solution to get 30L of a 46% concentrated saline solution. How many litres of each are needed to be mixed?
You invest a total of $1800 into two diffrent investments. One investment returned 9% and the other returned 6%. If the interest on the 9% was $102 more of a return than the return of the 6% investment then how much of your $1800 was in each seperate account?
I don't know how to set up any of these problems. If I could have help with the set up I could do it. These are the only problems on the sheet giving me problems. Thanks for your assistance.
Thanks, I knew the A+B= $1800 part, but the other part really threw me, with the one returned 9 percent was $102 more of a return than the 6 percent investment.
So You have the 1.09, The 1 represents 100 percent, plus an extra 9 percent on top of one and 6 percent on top of the other?
What about the saline solution one, I can't even make heads or tails of even the first equation.
Here is my work just in case it can help somebody else out:
A= -B+ 1800
1.09( -B + 1800) = $102 + 1.06B "Equal Quantities Method"
1860 = 2.15B
1860/2.15 = 2.15B/2.15B
(($865.12 = B))
1.09A = 102 + 1.06 (865.12)
1.09A = 102 + 917.03
1.09A/1.09A = 1019.03/1.09
(($934.89= A))
When you add A and B up it is $1800.01, With rounding off certain numbers it is .01 over the $1800, but it's around the same area.