Tuesday, February 12, 2008
Algebra (Class 49)
Lesson Title
Systems of Two Linear Equations- Part 2
Overview
In the last class we saw how the solution to such a system can be thought of as the point of intersection of the graphs of the two equations. When we deal with linear equations, the graphs will be lines, and hence the point of intersection of the lines will be the solution to the system. We also saw how to “set equations equal” in order to eliminate a variable. Once we had one equation with one variable we were able to solve the equation. Afterwards we could substitute the value back into the other equation and solve. We could then verify our solution by examining the graph as well as by substituting and evaluating each equation to make sure the point really was on both lines.
In today’s class we continue to develop our ability to solve a system of two linear equations by examining systems where at least one equation does not have an isolated variable.
Textbook Sections
§9-1 (Txt. p.413) Solving Systems of Linear Equations
Vocabulary
systems of equations
eliminate variable
isolate
Key Attitudes
Math is about investigating and confirming
Key Ideas
Key Skills
Graphing equations of lines.
Solving first degree equations of one variable.
Turn-In (#48)
Turn in #48
Packet SP15
§11-5 (Txt. p.526)#9-12
Handouts
No Handouts Posted
Assignment
Three systems of equations to solve:
Disclaimer- The assignment as stated in class is the official assignment. Every effort is made to keep this posting accurate, but you should refer to what was stated in class as the final word.
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