AlgebraMatrix
posted by lizzie
How would I do these Matrices?
1.
1/2 14
10 8
2,
Let matrix A = [8 2
4 7 ]
Let matrix B = 2A, Find b_22

Damon
1.
What do you want to do to it? Find the determinant?
If so
(1/2)(8)  (14)(10)
= 4 140
= 144
2.
2*7 = 14 
lizzie
Is this right then?
12 21
2 2/3
answer1/50 
Damon
 12 21 
 2 2/3
12(2/3) (21*2)
= 8  42
= 50 
lizzie
What about this one? Correct?
1 0
0 1
The answer would be 1 
Damon
Yes.
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