1. Warm Up

2. 3.5 systems with three variables Objective: To solve a system of equations in three variables How many environmental factors effect the growth of aspen trees in Colorado?

3. Types of solution explained in graphs

4. Solving Systems of Equations In three variables 1) How do you do it? 2) example Step 1: Pick two equations and use elimination to get rid of one variable Step 2: Repeat Step 1 with two different equations (eliminate same variable) Step 3: Solve your new system of two equations (elimination or substitution) Step 4: Plug your solution into ANY equation to solve for the third variable 1) 2)

8. Ordered Triple Solution of a system of equations in three variables x, y, and z (x,y,z) vocabulary

9. HW p 149 # 1, 3-5,7,8