Linear Inequalities
If we want to solve for or describe a region in a coordinate plane, we can use linear inequalities. Linear inequalities give us a set of solutions as opposed to just one solution. This video clip explains how to solve linear inequalities using similar methods as in solving multi-step equations, except that there are extra rules when using multiplication and division. We graph linear inequalities by shading regions of number lines or coordinate planes. (6:20)
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Solving Inequalities Using Multiplication
This video explains how inequalities follow different rules than equations when dealing with multiplication. Solving inequalities using multiplication involves watching for negative numbers. When we multiply both sides by a negative number we must change the direction of the inequality sign. This happens when using multiplicative inverses to simplify the way we would when solving multi-step equations. (2:11)
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This video shows the basic procedure and one full example of how to solve quadratic inequalities.Â  The instructor goesÂ  through and explains each step as it is written on the white board.Â

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Learn the quadratic formula and how to use it in problems. This catchy video comes from the Algebra Upgrade online course at www.learningupgrade.com.  It is one of those tunes that could get stuck in your head (which could be a good thing when you are trying to remember a formula!).
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This instructor in this video, Sal Khan,Â uses a calculator to perform a quadratic regression.Â Mr. Khan usesÂ computer softwareÂ (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen.
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Solving Inequalities in One Variable
This video shows examples of inequalities with one variable and the instructor goes through the steps necessary to solve the inequalities.Â  While he does this, he explains some of the important rules necessary for correctly solving inequalities.Â  He also identifies some common mistakes students make when solving inequalities.Â

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Graphing Inequalities on a Number Line
Instructor uses a white board to demonstrate solving inequalities in one variable and graphing the solution on a number line. Â Examples include one-step, two-step, and multi-step linear inequalities. Â
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How to Divide Inequalities
How to Divide Inequalities. Part of the series: Math FractionsÂ and Equations. When dividing inequalities, treat the equation like any other standard equation. Flip the inequality sign when dividing an inequality by a negative number with help from a math author and teacher.
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Solving and Graphing Inequalities
Inequalities are useful for finding a range of solutions. Solving and graphing inequalities is a key to finding and showing that range. This video clip explains how to solve inequalities using a lot of the same methods as those in solving multi-step equations when dealing with additive inverses, although some things are different when solving inequalities using multiplication. We graph inequalities using number lines. (1:32)
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Graphing Inequalities in Two Variables
This is a video tutorial of how to graph and shade inequalities involving two variables.Â  Instead of using a number line, the inequality is graphed on an x,y graph.Â  The instructor relates what is know about graphing equalities and applies this knowledge to graphing inequalities.Â  He works quickly through examples and doesn't show all of the steps needed in drawing the lines on the graph.

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Graphing Systems of Linear Inequalities
InÂ  this video, the instructor goes through the steps needed to graph a system of linear inequalities.Â  He discusses slope, shows how to draw the line on the coordinate plane, and explains what section of the graph should be shaded.Â  There is some shadow on the white board which makes it a little more difficult to see at times during the instruction.

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Solving and Graphing Linear Inequalities in Two Variables, Part I - Khan Academy
In this video, Sal Khan demonstrates how to solve and graph a linear inequality (y > 5). He starts with a number line. Salman Khan is the recipient of the 2009 Microsoft Tech Award in Education. (02:14) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' (02:15)
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Graphing Linear Inequalities in Two Variables, Part II - Khan Academy
In this video, Sal Khan demonstrates how to solve and graph a linear inequality (y < 3X + 5). Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (02:41) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.'
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Graphing Linear Inequalities in Two Variables, Part III - Khan Academy
In this video, Sal Khan demonstrates how to graph a linear inequality. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (03:20) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' (03:20)
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Graphing Systems of Inequalities, Part 1
The instructor in this video, Sal Khan, introduces the process ofÂ graphing inequalities.Â Â Mr. Khan uses the Paint Program (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â Microsoft Tech Award in Education. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small.
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Solving and Graphing Multi-Step Inequalities
Sometimes we get more complex inequalities that take more than one step to solve. This video clip explains how to solve multi-step inequalities by using addition and multiplication. Many of the techniques are similar to those learned when solving multi-step equations. (1:11)
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Physics: Hands-On/ Minds-On Learning
Examines overcoming obstacles to conceptual thinking. Is hands-on the same as minds-on? Why are concepts taught again and again, such as electricity and circuits, but still difficult to explain and put to work?Â
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Geometry Tips : The History of Pascal's Triangle
The history of Pascal's triangle begins with the Indians and the Persians who first started working on this pattern of numbers, and it developed through China in the 13th century hundreds of years before Pascal was even born.

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Circle Graphs, Part II
The instructor in this video explains what circle or pie graphs are. The instructor uses a whiteboard in front of a stationary camera and works with a pie chart that he has aleady created.
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War Birds of World War II
A video montage of the War Birds of World War II. Dedicated to the 60th anniversary of the Air Force, the War Birds of the world, and the brave pilots of World War II. (04:12)
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