Asked 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


Answered by 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
Answered by lizzie
Is this right then?
|12 -21
-2 -2/3|

answer-1/50
Answered by Damon
| 12 -21 |
| -2 -2/3|

12(-2/3) -(-21*-2)
= -8 - 42
= -50
Answered by lizzie
What about this one? Correct?
|1 0
0 1|
The answer would be 1
Answered by Damon
Yes.
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