math help please?

Question

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Answer 1

36)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

Solution:

The solutions of the equations are

37)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

Solution:

The solutions of the equations are

Answer 2

41)

Step 1:

The system of equations are

Solve by using matrices.

Write the equations into matrix form ,

Write the equations into matrix form , where is coefficient matrix,

is variable matrix and is constant matrix.

The augmented matrix is .

The augmented matrix is

 

Solution:

The solutions of the equations are

42)

This question first option is correct answer.