Posted by brittany on Tuesday, March 17, 2009 at 9:32pm.
i need help with my algebra 2 homework, the section is called using matrices to represent data. here is one of the problems:
1/2A+(BA) A=[7 3 1 5]
[2 8 0 4] and
B= [6 0 11 3]
[5 2 8 9]
i don't know how to do this problem and the book doesn't have a problem like this for me to look at i don't know which to solve first and does it matter which part you solve first
i would really appreciate it if you could help, thanks!
brittany

algebra 2  Reiny, Tuesday, March 17, 2009 at 10:28pm
(1/2)A is a scalar multiplication
simply multiply each member of the matrix by 1/2
to add or subtract matrices, they must first of all have the same dimension.
then simply add/subract the corresponding members.
here is a nice short webpage, look at the top examples.
http://www.purplemath.com/modules/mtrxmult.htm

algebra 2  brittany, Wednesday, March 18, 2009 at 9:38pm
thanks soo much!!!that helps!
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