ClassBrain Math » Pre-Algebra http://www.classbrainmath.com A ClassBrain site for Mathematics Tue, 19 Oct 2010 04:44:51 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 What Are Variables? http://www.classbrainmath.com/2010/03/introduction-to-equations-defining-variables/ http://www.classbrainmath.com/2010/03/introduction-to-equations-defining-variables/#comments Thu, 18 Mar 2010 03:29:58 +0000 admin http://www.classbrainmath.com/?p=452
Contents
  1. More Practice:
  2. Brightstorm Lessons
  3. SAT Test Prep

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.

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More Practice:


What Are Variables?

Brightstorm Lessons


Related to:
What is the Inverse of a Square Matrix?

SAT Test Prep

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]]> http://www.classbrainmath.com/2010/03/introduction-to-equations-defining-variables/feed/ 0 How Do You Graph Rational Functions, n=m? http://www.classbrainmath.com/2010/03/graphing-rational-functions-nm/ http://www.classbrainmath.com/2010/03/graphing-rational-functions-nm/#comments Thu, 18 Mar 2010 01:56:20 +0000 admin http://www.classbrainmath.com/?p=432
Contents
  1. How Do You Graph Rational Functions, n=m?

How Do You Graph Rational Functions, n=m?

Rational Function Graphs: There are different characteristics to look for when creating rational function graphs. With rational function graphs, we can find a horizontal asymptote where the degree of the numerator function is equal to the degree of denominator function. There are other techniques for drawing rational function graphs when the degree of the numerator is less than, or greater than, that of the denominator.

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]]> http://www.classbrainmath.com/2010/03/graphing-rational-functions-nm/feed/ 1 What Are Percentages? http://www.classbrainmath.com/2010/03/percents/ http://www.classbrainmath.com/2010/03/percents/#comments Fri, 12 Mar 2010 07:58:24 +0000 admin http://www.classbrainmath.com/?p=374
Contents
  1. What Are Percentages?

What Are Percentages?


A percentage is a special ratio in which the second term of the ratio is always 100. By expressing a number as a percentage you are reflecting how many times it occurs in relation to 100 times. As an example: 3/4 is expressed as 75/100 or 75%. In other words, there would be 75 out of 100 occurrences, people, places, etc.

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]]> http://www.classbrainmath.com/2010/03/percents/feed/ 0 What Are Ratios and Proportions? http://www.classbrainmath.com/2010/03/ratios-and-proportions/ http://www.classbrainmath.com/2010/03/ratios-and-proportions/#comments Fri, 12 Mar 2010 07:20:05 +0000 admin http://www.classbrainmath.com/?p=371

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.

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]]> http://www.classbrainmath.com/2010/03/ratios-and-proportions/feed/ 0 Simplifying Expressions & Combining Like Terms http://www.classbrainmath.com/2010/03/simplifying-expressions-combining-like-terms/ http://www.classbrainmath.com/2010/03/simplifying-expressions-combining-like-terms/#comments Thu, 11 Mar 2010 06:18:00 +0000 admin http://www.classbrainmath.com/?p=368

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.

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