Posted by **Maria ** on Thursday, January 9, 2014 at 9:05pm.

Which matrix represents the system of equations below?

-10x-9y+13z=12

8x-7y-5z=15

5x+4y-6z=-12

a. -10,-9,13

8,-7,-5

5,4,-6

b.-10,-9,13

8,7,5

4,4,-6

c.-10,8,5

-9,-7,4

13,5,-6

d. 10,8,5

9,-7,4

13,5,-6

- Algebra 2 -
**sasha**, Thursday, January 9, 2014 at 9:10pm
Ans: a.

the matrix will have the same signs of the coefficients of the equations.

- Algebra 2 -
**Reiny**, Thursday, January 9, 2014 at 9:49pm
Actually none of them do

the constants were completely ignored in all the choices.

You would want what is called the "augmented" matrix

-10 -9 13 12

8 -7 -5 15

5 4 -6 -12

btw, the elements of a matrix are not separated by commas

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