Showing posts with label linear expressions. Show all posts
Showing posts with label linear expressions. Show all posts

Wednesday, June 16, 2010

Graphing Linear Inequalities in Two Variables

Let me explain about Graphing Linear Inequalities in Two Variables,
A linear inequality in the two variables x and y looks like

where a, b, and c are constants.
A solution to an inequality is any pair of numbers x and y that satisfy the inequality.
The rules for finding the solution set of a linear inequality are much the same as those for finding the solution to a linear equation.
  1. Add or subtract the same expression to both sides.
  2. Multiply or divide both sides by the same nonzero quantity; if that quantity is negative, then the inequality must be reversed.
Hope the above explanation helped you.

Monday, July 6, 2009

Solving Linear Equations

Topic:- Linear Equation


A mathematical expression that has an equal sign and linear expressions is called a Linear equation.

A number that you don't know,often represented by "x" or "y" is called a variable.

We solving linear equations by clicking and dragging a number to the "other" side of the equal sign. Remember that you are "isolating" the unknown "X" to solve the problem.
(Example is provided below.)

Question:-

Solve 2x-18=15
Answer:-

This math help is a part of linear equations.

2x-18=15

Add 18 to both sides

2x-18+18 = 15 + 18

2x = 15+18

2x = 33


divide by 2 on both sides


2x      33
----- = -------
2        2


  x = 16.5

16.5 is the Answer.