Question 771698: Im having a hard time learning word problems especially mixtures, I got a low grade of 81% in my pre lim which is not enough if I would apply for a scholarship, please do help me, I am humbly asking you , is there anyway for me to really be able to understand it completely, and would I be able to be good in word problems. help guys pls. and thank u =)
Answer by josmiceli(19441)   (Show Source):
You can put this solution on YOUR website! Hi,
I specialize in mixture problems. You can
click on " our tutors " , and I am close to the
top of the list- Josmiceli.
Look for solutions to mixture problems
-----------------------------------
From an understanding point of view, you are
given some 20% mixture and some 50% mixture.
-----------------------------------------
Then you are told that you have to end up with
a certain quantity of 30% mixture, for example.
----------------------------------------
Note that the % that you end up with has to be
between 20% and 50%, or it can't be solved
-------------------------------------
Pay attention to units. The answer is usually in
the same units, like gallons.
------------------------
Right away, assign letters to the unknowns.
That helps to get it down right away, like:
Let  = gallons of 20% mixture needed
Let  = gallons of 50% mixture needed
--------------------------------------
Then, you are usually able to make two more statements:
 = gallons of concentrate ( acid or whatever ) in 20% mixture
 = gallons of concentrate in 50% mixture
Get this down right away
--------------------------------
Then, usually, you are able to say:
 = the given final quantity in gallons or whatever
--------------------------------------
Then you can say:
That's all you need to solve problem. Note that
is given .
-----------
Hope this helps. Go for easier ones and work up to harder ones
|
|
|
