Posted by **lizzie** on Friday, August 12, 2011 at 6:25pm.

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

- Algebra-Matrix -
**Damon**, Friday, August 12, 2011 at 7:03pm
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

- Algebra-Matrix -
**lizzie**, Friday, August 12, 2011 at 7:16pm
Is this right then?

|12 -21

-2 -2/3|

answer-1/50

- Algebra-Matrix -
**Damon**, Friday, August 12, 2011 at 7:19pm
| 12 -21 |

| -2 -2/3|

12(-2/3) -(-21*-2)

= -8 - 42

= -50

- Algebra-Matrix -
**lizzie**, Friday, August 12, 2011 at 7:32pm
What about this one? Correct?

|1 0

0 1|

The answer would be 1

- Algebra-Matrix -
**Damon**, Friday, August 12, 2011 at 8:10pm
Yes.

## Answer this Question

## Related Questions

- Math - I have a few questions about T-Matrix. In excel, I am suppose to work ...
- Math - Hi! I need help with these two questions. Thanks! :) 1.) Can we multiply ...
- Maths: Algebra Matrices Class 12th - matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} ...
- Algebra II - I skipped algebra I so I never learned about matrices. If you had a...
- matrices - Two matrices can be multiplied only if their sizes are compatible. ...
- Algebra II (Matrices) - My book doesn't solve it like a linear equation, they ...
- MATHS----Matrix - For a given square matrix A the predicted values of matrix B ...
- math - Two matrices can be multiplied only if their sizes are compatible. ...
- Calc - A video games shop is analyzing its sales performance using matrices. ...
- math - This is a matrix question. R is the matrix (3r 1) (s 2s) 1. State, in ...