1. Today’s Objectives:

2. Warm Up

3. 3.4 Systems in Three Variables You are familiar with a 2D coordinate plane. It is has an x-axis and a y-axis.

4. Z-Axis Today we add a third dimension. The z-axis.

5. Solving Systems Solving systems in three variables is similar to solving systems with two variables.

6. Methods Use the substitution or elimination method to solve a system of three variables. Graphing will not be helpful.

7. Example #1 Solve the system of equations.

8. Example #2 Solve the system of equations.

9. Example #3 Solve the system of equations.

10. Example #4 Solve the system of equations.

11. GROUP WORK Grab a book and turn to pg.165 As a group work through #3. Help each other. Compare answers.

12. Solve each system of equations Group Work #3

13. Homework Lesson 3.4 Pg.165 #’s 8, 10, 14, 15