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.

Jhendarto: BB-70

Explanation:

What I did to get the answer for BB-70 is...for example, A, the answer is 1.03y because

-I simplified y+0.03y...... is..... y (1+0.03)....... because the y in (0.03 y) is equal to 1

-Then I would get Y (1+0.03) and I simplify it again to get Y(1.03)

-Multiply Y to 1.03 and you get 1.03y

This is how you get the answeres for BB-70. This method works for all three problems.