Question

ok

Answer 1

in your calculator use the matrix system to find your answer, graphic calculator, 2nd x^-1, go over to edit, click edit A and make it 3x3, then plug in you x,y,z values. to tha again but edit B and make it 3x1, plug in your answers, after that go to your home screen and say A inverse B ENTER it will list three numbers, first number is x value

Answer 2

put the options in the eq...and you can easily cross check it

Answer 3

so 1st option is correct

Answer 4

@malehuman01 do u get it