Question

Help please???
Solve the following system of equations using matrices.
2x + 4y = 16
-4x – 8y = 32

A. (2, 2)


B. (-2, -2)


C. Consistent


D. Inconsistent

Answer 1

i would just use elimination after dividing the second equation by 2.

Answer 2

or, you can divide the second equation by -2 and then tell me what clue do you have (it's ok if you don't come up with any thoughts).

Answer 3

Do you have to (like just must) to use matrix to solve it?

Answer 4

I think its inconsistent because it can't be A. or B.

Answer 5

Can you tell me how many solutions it has?

Answer 6

\(\large\color{black}{ \displaystyle 2x + 4y = 16 \\
-4x – 8y = 32 }\)

divide the second equation by -2 and re-write the system of equations for me please.

Answer 7

If I graph the equations they never cross so it would be inconsistent, right?

Answer 8

yes.

Answer 9

but you should obtain that result not by graphing

Answer 10

you should have solved it. i would have helped you.

Answer 11

i mean if you are still willing to go through it....

Answer 12

I just wanted to check my answer to make sure I had done the problem correctly. Thank you for the help though <3