## Hayatcakes Group Title http://i729.photobucket.com/albums/ww292/akatushi101/algeeeeeeeeeee.jpg I need help on the Four questions . 2 years ago 2 years ago

1. Cynosure-EPR Group Title

=) Give me just a minute to write them down and snap a pic.

2. Hayatcakes Group Title

Okay :)

3. Hayatcakes Group Title

also these are Matrices

4. lalaly Group Title

$\left[\begin{matrix}2 & 3 \\ 5 & 1\end{matrix}\right]-\left[\begin{matrix}-1 & 7 \\ 9 & 8\end{matrix}\right]=\left[\begin{matrix}2-(-1) & 3-7 \\ 5-9 & 1-8\end{matrix}\right]=\left[\begin{matrix}3 & -4 \\ -4 & -7\end{matrix}\right]$

5. Cynosure-EPR Group Title

Are the first/third ones division or addition?

6. Hayatcakes Group Title

the first one is addition and the third one is addition

7. Cynosure-EPR Group Title

Thanks!

8. lalaly Group Title

oh u do the same, just change the minus sign to plus

9. Cynosure-EPR Group Title

10. Cynosure-EPR Group Title

Here you go (the first problem is last, because I thought it was a division sign!) http://postimage.org/image/kmf3y8d8n/

11. Hayatcakes Group Title

oh okay thanks !

12. Cynosure-EPR Group Title

You're welcome!

13. Hayatcakes Group Title

why is the third problem not possible?

14. Cynosure-EPR Group Title

Because the two matrices are of different dimensions. If you go ahead and try to attempt it, you'll see quickly that you've run out of numbers and have two left over. It simply doesn't work. =)

15. Hayatcakes Group Title

I have three questions left from this matrice ..can you help me :S?

16. Cynosure-EPR Group Title

Sure thing!

17. Hayatcakes Group Title
18. Hayatcakes Group Title

the 6th question there is no "-" or " + " so i think we can not operate it?

19. Cynosure-EPR Group Title

That would assume that you multiply them.

20. Hayatcakes Group Title

but it is set like this [ 1 2 ][1] [3 7] [5]

21. Cynosure-EPR Group Title

It's uploading! You can only multiply matrices if the rows of the first equals the columns of the second. Basically, how that works is you take the terms as such: [ a b ] [1] [ c d ] [5] so that the new matrix is: [ a*1 + b*5 ] [ c*1 + d*5 ]

22. Cynosure-EPR Group Title

Here ya go: http://postimage.org/image/p1sw2isxt/

23. Hayatcakes Group Title

oh okay.

24. Cynosure-EPR Group Title

Do you understand?

25. Hayatcakes Group Title

Yes.. :) I'm sorry these were the last ones. . these are the last remaining problems http://i729.photobucket.com/albums/ww292/akatushi101/ALGEE222.jpg

26. Cynosure-EPR Group Title

I'm sorry, but I have to head off to class now!=( You can try re-posting the new set for someone else to answer or wait a few hours for my response.

27. Hayatcakes Group Title

okay thanks for all the help!