Question

second to last: use Cramer's Rule to solve the system of equations:

Answer 1

Cramer's Rule: \[-A ^{-1}D=X\]

Answer 2

system:
x-y+2z+1=0
3x+y+4z-2=0
2y+z-2=0

Answer 3

so we need A, D, detA and A^-1

Answer 4

how do you draw matrices?

Answer 5

using the equation thing?