Elementary Algebra Review Part 5
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Lesson Summary:
In this lesson, the instructor goes over evaluating variable expressions using given values, writing and solving Geometry equations given a situation, and finding examples and counterexamples of statements. The transcript provides step-by-step examples for each concept, and also includes some concept problems for the viewer to try on their own.
Lesson Description:
Evaluating variable expressions using given values, writing and solving Geometry equations given a situation, finding examples and counterexamples of statements
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you evaluate variable expressions with given values of variables?
- How do you evaluate x - y + z when x = 2, y = -3, and z = -4?
- How do you evaluate z - x^3 when x = 2 and z = -4?
- How do you evaluate (x - y)/(z + 2) when x = 2, y = -3, and z = -4?
- How do you evaluate (x^2 - z)/(z - 3x) when x = 2, y = -3, and z = -4?
- If x = 56 degrees, and x and y are complementary angles, how do you find angle y?
- If x = 56 degrees, and x and y are supplementary angles, how do you find angle y?
- Is p + n always positive if p is positive and n is negative?
- Is p - n always positive if p is positive and n is negative?
- Is n - p always positive if p is positive and n is negative?
- How do you know if adding and subtracting positive and negative numbers will always result in a positive number?
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Staff Review
This lesson does more with plugging values into variable expressions and evaluating them using order of operations. Every step is explained very clearly again. A couple of examples are done finding angle measures from words as well as determining whether adding and subtracting positive and negative numbers will always result in a positive number.
