Question

Select the correct answer.
Which system of equations can be represented by this matrix?

Answer 1

The answer is A.

You put the numbers in order of the letters and if a letter is missing you put 0

Answer 2

A) x + 2y = 4

3x + 4y -9z = 2

-x + 7z = 1

Explanation:

The matrix form is

x y z

1 2 0 4

3 4 -9 2

-1 0 7 1

Here 0 represents no term in system.

So, the following system represents the above matrix.

x + 2y + 0z = 4 => x + 2y = 4

3x + 4y -9z = 2

-x + 0y + 7z = 1 => -x + 7z = 1

Therefore, the answer is A.