Algebra 2 3-5 Complete Lesson: Systems With Three Variables

Problem 2 Got It? What is the solution of the system? Use elimination.

Problem 2 Got It? Reasoning: Could you have used elimination in another way? Explain. HINT: Could you have eliminated a difference variable first?

Problem 3 Got It? What is the solution of the system? Use substitution.

Reasoning: How do you decide whether substitution is the best method to solve a system in three variables?

Error Analysis: A classmate says that the system consisting of x = 0, y = 0, and z = 0 has no solution. Explain the student's error.

Writing: How many solutions does this system have? Hint: Is the system dependent? inconsistent?

Explain your answer in terms of intersecting planes.

Review Lesson 3-4:

1. Graph the system of inequalities to form a feasible region.

2. Zoom and pan your graph to establish an appropriate viewing window.

3. Click on each vertex of the feasible region to make its label appear.

4. Re-zoom and re-pan again, if necessary, to ensure that the feasible region and vertex labels are showing.

Review Lesson 3-4: Refer to the constraints and feasible region in the previous item. At what vertex does the maximum value occur for the objective function, P, below?

Review Lesson 1-5: Solve the inequality. Graph the solution on a number line.

Review Lesson 3-2: Solve the system using elimination. Show your work on the canvas and write the solution in the space provided.

Vocabulary Review: How many points determine a plane?

Use Your Vocabulary: Classify each ordered triple based on its x-coordinate.

Notes: Take a clear picture or screenshot of your Cornell notes for this lesson. Upload it to the canvas. Zoom and pan as needed.

For a refresher on the Cornell note-taking system, click here.

Reflection: Math Success