Amsco Integrated Algebra I: Using Systems of Equations to Solve Verbal Problems
 This is a free lesson from our course in Amsco's Integrated Algebra

 In this lesson you’ll learn how to solve verbal problems by using systems of equations. You may recall previous learning to solve word problems by using one variable. However, in real life these problems can be more complex calling to solving systems of equations more easily by using two variables. Solving systems of equations can use various methods like - substitution, elimination using addition and subtraction, and elimination using multiplication etc. The approach will be to read the problem carefully, analyze and solve. (More text below video...)
People who saw this lesson also found the following lessons useful:
 Writing an Equation Given Slope and One Point Writing an Equation Given the Intercepts Using Addition to Solve a System of Linear Equations
 (Continued from above) For example: Given- A passenger jet took three hours to fly 1575 miles in the direction of the jet stream. The return trip against the jet stream took 3.5 hours. What was the jet's speed in still air and the jet stream’s speed? The solution is as below: You need to know first that ‘in still air’ (for plane) or ‘in still water’" (for boat), mean the speedometer reading of each respectively. Now pick the variables and proceed – say use j for ‘the plane's speedometer reading’ and w for ‘the wind speed’. • in both the cases, total distance traveled equals to the combined speed multiplied by time taken i.e. • with the jet stream:   (j+ w)(3) = 1575 against the jet stream:  (j– w)(3.5) = 1575 • divide the first and second equation by 3 and 3.5 respectively. • then the equations are j+ w = 525                                   j– w = 450 • adding these equations results in 2j= 975 i.e. j= 487.5, and w must then be 37.5. The jet's speed was 487.5 mph in still air and in other case the speed was 37.5 mph, as the final answer. The video above explains; more details on Using Systems of Equations to Solve Verbal Problems, with the help of several examples and their solutions.

 As many of you know, Winpossible's online courses use a unique teaching method where an instructor explains the concepts in any given area to you in his/her own voice and handwriting, just like you see your teacher explain things to you on a blackboard in your classroom. This particular lesson includes the teacher's instruction, practice questions as well as end-of-lesson quizzes for practice. As we mentioned above, you can enroll in our online course in Trigonometry by clicking here. The format of Winpossible's online courses is also very suitable for teachers who are using an interactive whiteboard such as Smartboard on Promethean in their classrooms, because the course lessons can be easily displayed on such interactive whiteboards. Volume pricing is available for schools interested in our online courses. For more information, please contact us at educators@winpossible.com.

 Copyright © Winpossible, 2010 - 2011 Best viewed in 1024x768 & IE 5.0 or later version