Variables are used throughout Algebra, Geometry, and Calculus. They are the basic building blocks. Variables are therefore very important to understand.

A variable is a symbol, such as x, that is used to describe an unknown number. In functions variables often represent not one number, but many different numbers. Understanding variables is essential for you to understanding problems that will need to be graphed.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos.

More Practice:

Brightstorm Lessons

• What Are Additive and Multiplicative Inverses?
• How Do You Simplify Expressions and Combine Like Terms?

SAT Test Prep

Brightstorm also has 24/7 SAT test prep! Don’t take a chance at missing out on your first choice school because of a low SAT score. Plan your SAT studying around your schedule with this great SAT test prep program!

Graphing Lines Using a Table of Values

We often use a table of values to plot and connect points when we are graphing a line. Sometimes graphing lines using an equation involves the same methods as using a table of values. There are several other methods of graphing lines, including using the point-slope method. Understanding how graphs, tables and equations all work in harmony is essential to your understanding of Algebra.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos.

More Practice:

Brightstorm Lessons

• Linear Equations and Their Graphs
• How Do You Graph Lines using Intercepts
• How Do You Create the Point-Slope Form of Linear Equations

SAT Test Prep

Brightstorm also has 24/7 SAT test prep! Don’t take a chance at missing out on your first choice school because of a low SAT score. Plan your SAT studying around your schedule with this great SAT test prep program!

Equations are fundamental to Algebra, and solving linear equations is necessary for you to learn how to solve two-step equations, and other multi-step equations. Solving linear equations involves finding the value for the variable that makes the statement true using additive and multiplicative inverses.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos.

More Practice:

Brightstorm Lessons

• How Do You Solve For a Parameter in a Linear Equation?
• How Do You Apply Linear Equations to Geometry Problems?
• How Do You APply Linear Equations to Distance Problems?

SAT Test Prep

Brightstorm also has 24/7 SAT test prep! Don’t take a chance at missing out on your first choice school because of a low SAT score. Plan your SAT studying around your schedule with this great SAT test prep program!

If logarithms seem like Greek to you, this interactive algebra 2 lesson will help you sort things out. We can use many bases for a logarithm, but the bases most typically used are the bases of the common logarithm and the natural logarithm. The common logarithm has base 10, and is represented on the calculator as log(x). The natural logarithm has base e, a famous irrational number, and is represented on the calculator by ln(x). The natural and common logarithm can be found throughout Algebra and Calculus.

What Are Natural and Common Logarithms?

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos.

More Practice:

Brightstorm Lessons

• How Do You Expand Logarithms?
• How Do You Condense Logarithms?
• How Do You Solve a Logarithmic Equation?

SAT Test Prep

Brightstorm also has 24/7 SAT test prep! Don’t take a chance at missing out on your first choice school because of a low SAT score. Plan your SAT studying around your schedule with this great SAT test prep program!

Learning to work with ratios and proportions is one of the most useful things you can learn to do. Mastering ratios and proportions will help you figure out everything from the amount of paint you need to paint your room to the amount of tax you will owe on a TV.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Pre-Alegra videos at Brightstorm.

It is important to combine like terms so that you are dealing with the simplest form of the expression or equation. This makes the expression or equation simpler to work with and shorter to read.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Pre-Algebra videos at Brightstorm.

The standard form of a line puts the x and y terms on the left hand side of the equation, makes the coefficient of the x-term positive, and puts everything else on the right side. The standard form is not used for graphing. In that case you would use the slope-intercept form.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Graphs of Linear Equations videos at Brightstorm.

Click here to sign up for 24/7 SAT test prep!

Solving quadratic equations using square roots works best under special circumstances. If your equation does not have a “b” term this technique may be a good one for you to try. Keep in mind that if this technique does not work well with your equation, there are a number of other techniques that can be used instead.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Quadratic Equations and Functions videos at Brightstorm.

Click here to sign up for 24/7 SAT test prep!

Systems of equations are concepts that first show up in Algebra I. Systems of equations are problems with two or more equations that contain the same variables. There are four methods to solving systems of equations: graphing, substitution, elimination and matrices.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Solving Systems of Equations videos at Brightstorm.

Click here to sign up for 24/7 SAT test prep!

This video covers the five basic properties of real numbers. These properties of real numbers, including the Associative, Commutative, Multiplicative and Additive Identity, Multiplicative and Additive Inverse, and Distributive Properties, can be used not only in proofs, but in understanding how to manipulate and solve equations.

This video is brought to you by Brightstorm, where you can see over 2,000 free math videos. See more Real Numbers videos at Brightstorm.

Click here to sign up for 24/7 SAT test prep!