David Rubenstein

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Absence 2/6/2014
by David Rubenstein on 2/5/2013 Length:
Walkthrough of notes and examples for Cosine and Tangent Trigonometric Functions.

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Trigonometry Introduction
by David Rubenstein on 2/4/2013 Length:
Here is a basic introductory video to Trigonometry. This video shows how to setup the triangle with the labels on the correct sides and how to setup and solve sin, cos, and tan problems using the triangle.

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Inverse Variation
by David Rubenstein on 1/30/2013 Length:
This is an example of inverse variation. This example includes an independent variable where the power is other than 1. You should see that the power doesn't matter in the basic formation of the equation.

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Direct Variation
by David Rubenstein on 1/30/2013 Length:
This is an example of of direct variation as applied in physics with the formula F=ma.

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Graphing Linear Inequalities
by David Rubenstein on 1/9/2013 Length:
This video shows examples of graphing linear inequalities with appropriate shading. Use the following link to download the Video.

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Solving and Graphing Inequalities Pt. 1
by David Rubenstein on 1/8/2013 Length:
This video shows how to graph problems such as 2x + 4>24. Single variable with a single axis. If the main link does not work on your device, you can download this Video.

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Solving and Graphing inequalities pt. 2
by David Rubenstein on 1/8/2013 Length:
This video shows how to solve and graph single variable inequalities such as m/3 - 3 < -6. Use the following link to download the Video.

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Solving and Graphing Inequalities Pt. 3
by David Rubenstein on 1/8/2013 Length:
This video explains how to solve and graph single variable inequalities such as -3(p + 1) < -18. Use the following link to download the Video.

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Solving and Graphing Inequalities pt 4
by David Rubenstein on 1/8/2013 Length:
This video explains how to solve and graph single variable inequalities such as (-9 + a)/15 >1. Use the following link to download the Video.

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Solving for Y
by David Rubenstein on Length:
Part one of the Solving for Y series.

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Solving for Y with negatives.
by David Rubenstein on Length:
Part 2 of Solving for Y. Now with negatives.

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Solving for Y with Inequalities
by David Rubenstein on Length:
Part 3 of the Solving for Y series.
This time we're using inequalites like < and >.

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Solving for Y: Negatives and Inequalities
by David Rubenstein on Length:
This is part 4 of the Solving for Y series. This episode combines negative y with inequalities.

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Clearing Fractions
by David Rubenstein on Length:
Simplify equations by eliminating those pesky fractions with minimal effort.

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Minus Vs. Negatives
by David Rubenstein on Length:
Find out when you should use the minus key and when to use the negative button on your calculator.

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