# 1. What is the solution of the matrix equation?

|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.

## 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

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

FOR CONNEXUS. 100% CORRECT

## 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.

## To find the solution of the matrix equation, you need to perform matrix multiplication.

The matrix equation is given as:

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

To solve this, you need to multiply the left matrix by the right matrix. The result will be the solution matrix.

So, let's perform the multiplication:

9 * -9 + 4 * -1 = -81 + (-4) = -85
9 * (-6) + 4 * (-8) = -54 + (-32) = -86

2 * -9 + 1 * -1 = -18 + (-1) = -19
2 * (-6) + 1 * (-8) = -12 + (-8) = -20

Therefore, the solution matrix is:

|-85 -86|
|-19 -20|

Comparing this with the given options, we see that the solution matrix matches option C:

|-5 26|
|9 -60|

So, the correct answer is C.