Write the system in a matrix equation. Then, find the determinant of the matrix containing the coefficients. 3x + 2y +z = -8
-y-2x + 4z = 7 X-6y-3z=15
х– бу – Зz = 15

See below for the matrix

D = 100

Step-by-step explanation:

         3    2    1

D =   -1    -2    4    =   3(-2)(-3) + 2(4)(1) + 1(-1)(-6)  

         1    -6   -3

                                    - 1(-2)(1) - 3(4)(-6) - 2(-1)(-3)

                           =  18 + 8 + 6 + 2 + 72 - 6

                           =  100

Sorry, I can't type the vertical bars.

I hope this is what you are looking for.

answer: its the third option.

step-by-step explanation:

i just took the test.

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.