## Elementary Algebra Review Part 5

Elementary Algebra Review Part 5
• Currently 4.0/5 Stars.
5092 views, 1 rating - 00:10:18
Part of video series Elementary Algebra Review
Taught by YourMathGal
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Evaluating variable expressions using given values, writing and solving Geometry equations given a situation, finding examples and counterexamples of statements

• 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?
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.
• Currently 4.0/5 Stars.
Reviewed by MathVids Staff on October 29, 2009.