Algebra 2

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

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asked by Maria
  1. Ans: a.

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

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    posted by sasha
  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

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    posted by Reiny

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