Describe how to use each method of solving a system of linear equations: Graphing subtution elimnation + - x?

Question

Graphing subtution elimnation with addition and subtraction multiplication

Given the information for the following situations select the most efficient method to write and so;ve a system of equation.

Answer 1

Ok it has been a little while for me, but lets just try this out. First off I bet this is a question for your math homework, isn't it? Check the back of the book for the answer, and if this is an even numbered question, I will give my best answer. When you graph the linear equations, first put them into the slope intercept form y=mx+b. Then use b as the y intercept, and m as the slope. The substitution method is great, probably my favorite, but the others are used for matricies. In fact you cannot use straight multiplication without addition or subtraction, and you cannot use elimination without addition or subtraction, so they are all tied together. Personally, I stay away from matricies, but 2 equation systems obviously call for substitution because it is easy. So the method of choice depends on the number of equations in the system. Good Luck..... and I hope this helped you out a little.

Answer 2

A system of linear equations is two or more linear equations that are being solved simultaneously. In general, a solution of a system in two variables is an ordered pair that makes BOTH equations true. In other words, it is where the two graphs intersect, what they have in common. So if an ordered pair is a solution to one equation, but not the other, then it is NOT a solution to the system. A consistent system is a system that has at least one solution. An inconsistent system is a system that has no solution There are three ways to solve systems of linear equations in two variables: graphing substitution method elimination method

Answer 3

yawn

Answer 4

http://en.wikipedia.org/wiki/Simultaneous_equations

http://www.themathpage.com/alg/simultaneous-equations.htm