Which matrix represents the system of equations below?

Question

-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

Answer 1

Ans: a.

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

Answer 2

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

Answer 3

8 years later and this question still comes in handy!