anonymous
  • anonymous
http://i729.photobucket.com/albums/ww292/akatushi101/algeeeeeeeeeee.jpg I need help on the Four questions .
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
=) Give me just a minute to write them down and snap a pic.
anonymous
  • anonymous
Okay :)
anonymous
  • anonymous
also these are Matrices

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lalaly
  • lalaly
\[\left[\begin{matrix}2 & 3 \\ 5 & 1\end{matrix}\right]-\left[\begin{matrix}-1 & 7 \\ 9 & 8\end{matrix}\right]=\left[\begin{matrix}2-(-1) & 3-7 \\ 5-9 & 1-8\end{matrix}\right]=\left[\begin{matrix}3 & -4 \\ -4 & -7\end{matrix}\right]\]
anonymous
  • anonymous
Are the first/third ones division or addition?
anonymous
  • anonymous
the first one is addition and the third one is addition
anonymous
  • anonymous
Thanks!
lalaly
  • lalaly
oh u do the same, just change the minus sign to plus
anonymous
  • anonymous
It's uploading.. la dee da!
anonymous
  • anonymous
Here you go (the first problem is last, because I thought it was a division sign!) http://postimage.org/image/kmf3y8d8n/
anonymous
  • anonymous
oh okay thanks !
anonymous
  • anonymous
You're welcome!
anonymous
  • anonymous
why is the third problem not possible?
anonymous
  • anonymous
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. =)
anonymous
  • anonymous
I have three questions left from this matrice ..can you help me :S?
anonymous
  • anonymous
Sure thing!
anonymous
  • anonymous
http://i729.photobucket.com/albums/ww292/akatushi101/ALGEBROOO.jpg
anonymous
  • anonymous
the 6th question there is no "-" or " + " so i think we can not operate it?
anonymous
  • anonymous
That would assume that you multiply them.
anonymous
  • anonymous
but it is set like this [ 1 2 ][1] [3 7] [5]
anonymous
  • anonymous
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 ]
anonymous
  • anonymous
Here ya go: http://postimage.org/image/p1sw2isxt/
anonymous
  • anonymous
oh okay.
anonymous
  • anonymous
Do you understand?
anonymous
  • anonymous
Yes.. :) I'm sorry these were the last ones. . these are the last remaining problems http://i729.photobucket.com/albums/ww292/akatushi101/ALGEE222.jpg
anonymous
  • anonymous
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.
anonymous
  • anonymous
okay thanks for all the help!

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