These two videos focus on how to define two variables, set up two equations, and check the solutions.
Several problems are presented, but using the methods of graphing, substitution, and addition to solve the problems are not shown.
Even the best athletes and musicians had help along the way and lots of practice, practice, practice, to get good at their sport or instrument.
To get the most out of these, you should work the problem out on your own and then check your answer by clicking on the link for the answer/discussion for that problem.
In problem solving it is good to look back (check and interpret)..
Basically, check to see if you used all your information and that the answer makes sense.
At the link you will find the answer as well as any steps that went into finding that answer.1c.
A student has money in three accounts that pay 5%, 7%, and 8%, in annual interest.
In order to show an understanding of the problem you of course need to read the problem carefully.
Sounds simple enough, but some people jump the gun and try to start solving the problem before they have read the whole problem.