HELP ASAP
Select the correct answer.
D = matrix (1 2 -3
2 -6 1
4 2 5)
is the coefficient matrix of a system of linear equations and
Dx = matrix ( 46 2 -3
-41 6 1
-11 2 5)

What is the solution of the system of linear equations represented by D and Dx?A.
(5, 4, -11)
B.
(5, 7, -9)
C.
(6, 7, -11)
D.
(6, 4, -9)

Its B (5,7,-9).

Step-by-step explanation:

I didn't know the answer I just knew it wasn't D so I did a random number generator of 1-3 it gave me two I put it in and IT WAS RIGHT.

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.