October 04, 2016

DO NOW!1) Take out the 4.1 note guide for Dylan to check.

2) Can you spot the mistake in this problem? What did this person do well?

October 04, 2016

Today's Agenda:1) 4.1: Matrix Operations

2) 4.2: Multiplying Matrices

3) Homework Time - Thank-you card for Dan

October 04, 2016

Remember this problem?

In this chapter, we are going to learn at least three different ways to use matrices to solve systems of equations!

October 04, 2016

4.1 Date:

• I CAN use matrix operations

October 04, 2016

Use your note guide to help you solve this problem:

October 04, 2016

What are matrices?• Dimensions:

• Equality:

October 04, 2016

What do matrices represent?• Data sets

• Equations

October 04, 2016

Solving matrix equations:• Use the property of matrix equality:

October 04, 2016

Let's try an application!• The figures below give the number (in millions) of CD, download, and DVD

units shipped and the dollar value (in millions) of these shipments.

• 2006: > Number of units - CDs: 20,779, downloads: 15,299, and DVDs: 45> Dollar value - CDs: 268,441, downloads: 122,329, and DVDs: 916

• 2007> Number of units - CDs: 26,277, downloads: 17,799, and DVDs: 70> Dollar value - CDs: 344,697, downloads: 144,634, and DVDs: 1,260

• Use matrices to organize the information, and then write a matrix that gives the change in units shipped and dollar value from 2006 to 2007.

October 04, 2016

Your chance to learn more about your classmates!

Who is __________?We will ask question until the timer ends. Be creative!

Ground Rules:- Inappropriate questions will end the activity. Act responsibly so we can all enjoy the opportunity to get to know each other!

VIPSpotlight

October 04, 2016

4.2 Date:

• I CAN multiply matrices

October 04, 2016

Dimension requirements:

October 04, 2016

An Example (Calculator):

Chapter 4 Calculator Policy:

TI84PlusSE.rom

October 04, 2016

Your turn:• Solve your two problems. Then pass your paper to your right.

When you receive a paper, check the answer using your calculator.

October 04, 2016

Concept Check:

Today we learned....

1) How to use matrix operations

2) How to multiply matrices

Update Your Assignment Sheet with Tonight's Homework:

Section 4.1 assignment

Section 4.2 assignment

Assigned: __________ Stamped: _________ Due: __________

Ch. 3 Test Corrections Due ___________

October 04, 2016

Homework Time!• You may work alone or with the other members of

your table• Use your time Productively!