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Algebra Collection
Commutative Law for Multiplication
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Commutative Law for Multiplication

The commutative law for multiplication: ab = ba.

Commutative and Associative Laws
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Commutative and Associative Laws

Summary of the commutative and associative laws.

Commutative, Associative, and Distributive Laws, The
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Commutative, Associative, and Distributive Laws, The

Why the commutative, associative, and distributive laws are important to algebraic operations.

Comparing Standard and Slope-intercept Form
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Comparing Standard and Slope-intercept Form

Standard form and slope-intercept form equations give you different ways of looking at a problem.

Coordinate Plane
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Coordinate Plane

Graphs are created on an imaginary surface called a coordinate plane, which contains vertical and horizontal number lines. Using the numbers on the axes to plot points on the plane creates a picture of the solution.

Deciding Between Substitution and Elimination
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Deciding Between Substitution and Elimination

How to decide whether substitution or elimination is the better method for solving a system of equations in which one equation has been solved for a variable.

Denominator of a Simplified Expression Never Has Radicals, The
01:42

Denominator of a Simplified Expression Never Has Radicals, The

A guideline is presented: a simplified radical expression never has radicals in the denominator. An expression with a radical in the denominator, but not in the numerator, is simplified using the identity property of mul..

Determining the Value of a Variable
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Determining the Value of a Variable

Sometimes a variable can appear more than once in a single algebraic equation. These different variables are represented by different symbols.

Different Ways to Write the Same Inequality
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Different Ways to Write the Same Inequality

Inequalities can be written in more than one way. X < 10, for example, is the same as 10 > X.

Distributive Law Defined
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Distributive Law Defined

Summary of the distributive law.

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