Class Notes (4-17-08) Thursday

Here are the notes from today's class.



Example #1:

Class Notes (4-10-08) Thursday

Class Notes (4-8-08) Tuesday

Here are the notes from today's class. We worked on solving systems of equations using matrices. The class assignment is on moodle.

Class Notes from (4-7-08) Monday

Here are the notes from today's class. There were many struggles, especially with using Microsoft Excel, but we will continue tomorrow.

Classwork April 1, 2008 by Josh H.

What we did in class 4/ 1/ 08 was:

Finish Up 3/ 31/ 08 classwork- Monday's classwork in excell.
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Warm Up Problems
(4-1-08) Tuesday

1. Is matrix multiplication commutative? Prove using examples.



2. Multiply the following matrices

| 4 6 8 |
| 3 17 9 |
| 7 17 21 | | 21 26 32 39 |
| 6 22 32 | * | 24 27 34 40 |
| 8 15 55 | | 25 28 37 41 |


Upload Problems!
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Finish Friday's and Monday's claswork.
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Next Scribe 4/ 3/ 08 Thursday is Patrick W.

Ipiphani's Scribe for Monday, March 31, 2008

Correction for Important Notes For Multiplying matrices in Excel:
1. You must name you matrices/arrays (Upper left corner of Formula Bar)
2. Highlight where you want your result to go.
3. Go to Insert Function, click Math & Trig., then MMULT (Matrix Multiplication)
4. Name your Arrays, then Press and hold (all together) control + shift + enter to fill your array


Scribe for next class is JOSH H.

Dakota's Scribe Post for Friday(3/28/08)

Today in class we learned about multiplying matrixes. When multiplying you must mutiply first and then add to get the correct answer. For example for problem #! you would multiply 4*20(cars) and 6*25(trucks) and then add them together to get the total number of (w)wheels= 230


Notes:
1. Matrix Multiplication
c t w s g w s g
BE [20 25] * c⎡4 2 1⎤ = BE [230 65 95]
t ⎣6 1 3⎦
(1row byt 2 coulmns) * (2 rows by 3 columns)
w s g
BE[230 65 95]
(1row by 3 columns)

c t w s g
2. BE⎡20 25⎤ c⎡4 2 1⎤ = BE⎡230 65 95⎤
FA⎣13 15⎦ * t⎣6 1 3⎦ FA⎣14241 58⎦

(2rows by 2 columns) * (3rows by 3 columns)