223k views
2 votes
I NEED HELP PLEASE, THANKS! :) Write the augmented matrix for the system of linear equations. –9w + x + 8y + 2z = –6 –5x + 9y – 7z = 6 –3w – 6x + 4y + 9z = 4 –3w – 8x + y = –2

I NEED HELP PLEASE, THANKS! :) Write the augmented matrix for the system of linear-example-1
User Dave Hogan
by
7.3k points

2 Answers

6 votes

Answer:

First Matrix

Explanation:

Looking at the first equation, we see that the leading coefficient is -9. This gets rid of choice B and D because the first number in these matrices are not -9. You are left with choices A and C. Looking at the second equation, we see that there is no "w" variable, so we need to add one. The coefficient of this "w" is going to be 0. This means that A is the correct choice. Just to be sure though, evaluate all other coefficients to see if they line up with the matrix. Hope this helps.

User Pistal
by
8.1k points
0 votes

Answer:

3rd Matrix

Explanation:

When you start putting the coefficients in as the matrix, you see that -9 has to be the 1st number, so that eliminates choice B and choice D as answers. You are left with choices A and C. C is the correct choice because when you plug in the second equation, your coefficient is -5, not 0.

User Franticfrantic
by
8.0k points

Related questions

2 answers
0 votes
121k views
asked Jul 11, 2019 24.6k views
Misol Goh asked Jul 11, 2019
by Misol Goh
7.6k points
2 answers
5 votes
24.6k views
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.