Khan Academy: Algebra: Introduction to Logarithm Properties 2

Sal gets to the heart of this video, clarifying that it's important to understand math "so you can apply it later on and not have to relearn everything every time." True to his word, Sal demonstrates ways to solve logs and exponents more...

Identifies the properties for adding and subtracting logarithms with the same base. Practice problems available. [9:15]

Explains what a logarithm is and the relationship between logarithms and exponents. Practice problems available. [9:48]

Second part of the introduction to logarithm properties.

This video demonstrates how to evaluate an expression with two variables using substitution. [1:46]

Demonstrates how to apply the logarithm property regarding the sum of logarithms with the same base to simplify a logarithmic expression. [5:04]

This lesson goes through three examples of matrix multiplication. Explains how the dimensions of matrices affect whether or not the matrices can be multiplied, how to determine if they can be multiplied, and what size the resulting...

This video demonstrates how to set up and solve a system of equations in order to solve a word problem concerning rates. [10:04]

A video that demonstrates how to set up and solve systems of equations in order to answer word problems. [12:20]

Video demonstrates how to divide by a monomial to find the height of a cylinder with a given volume and radius. [4:05]