1. What is the solution of the matrix equation?

Question

|9 4| |-9 -6|
| | X =| |
|2 1| |-1 -8|

A.) |5 -26|
|9 -60|

B.) |-5 26|
|-1 -8|

C.) |-5 26|
|9 -60|

D.) |9 26|
|9 1|

I think the Answer is B. But I am unsure.

Thanks.

Answer 1

Assuming you mean matrices and not determinants, take a look at

http://www.wolframalpha.com/input/?i={{9%2C4}%2C{2%2C1}}+*+{{-9%2C-6}%2C{-1%2C-8}}

The result is not one of your answers, so there's a typo somewhere. You can easily adjust the numbers on that web page, till things turn out right.

Answer 2

The answers for lesson 4 inverse matrices and systems.
what is the solution of the system.... |9 4| |-9 -6|
| | X =| |
|2 1| |-1 -8| the answer is -5 26 9 -60, so C

-3x+2y=10 -4+3y=2 the answer will be -26 -34, so A.

I'm tired so the answer are is this order for me. 1. C 2. C 3.A 4. A 5.C

Answer 3

QueenT is correct 👌

Answer 4

QueenT is right !

Answer 5

1. C 2. C 3.A 4. A 5.C

FOR CONNEXUS. 100% CORRECT

Answer 6

Thank you for verifying the answers!