Algebra 2
posted by Maria .
Which matrix represents the system of equations below?
10x9y+13z=12
8x7y5z=15
5x+4y6z=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

Ans: a.
the matrix will have the same signs of the coefficients of the equations. 
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