SOLUTION: 1. If matrix A = [2 -4] and matrix B= [-2 5 0] [3 1] [-1 0] a) give the dimensions of A b) give the dimensions of B * the matrix a look

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Question 389283: 1. If matrix A = [2 -4] and matrix B= [-2 5 0]
[3 1]
[-1 0]
a) give the dimensions of A
b) give the dimensions of B
* the matrix a looks like this (i dont know how to make the big blocks) :
2 -4
3 1
-1 0
in light of the dimensions above,
1.can you multiply A x B?
2.if so, what are the dimensions of the result
3.give the result if possible.

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
If I am understanding your question properly
[A]=
[B]=
a) give the dimensions of A: 3x2 ( 3 rows and 2 columns)
b) give the dimensions of B: 1x3 ( 1 rows and 3 columns)
1.can you multiply A x B? Yes (B has the same # of columns as A has rows)
2.if so, what are the dimensions of the result 1x2
3.give the result if possible.
-2*2 + 5*3 + 0*-1 = 11
-2*-4 + 5*1 +0*0 = 13
[B]x[A] = [11 13]



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