Systems of Equations Using Matrices

Calculate the determinant

• 0

• -15

• -70

• 10

This is an example of a

• System of Quadratic Equations

• Reduced Row Echelon Form

• Augmented Matrix

• Row Echelon Form

Solve!

• (2,7,5)

• (-8,7,5)

• (-8,2,5)

• (-3,2,5)

What is an appropriate first row command to solve this by Gaussian Elimination?

• 2R2 + R2 -> R2

• -2R1 + R2 -> R2

• R3 +R2 --> R3

• 2R1 + R2 --> R2

What is the solution represented by this matrix?

• (2,3,5,0)

• (2,3,4,5)

• Infinite Solutions

• No Solution

What is the solution to the 4x5 Matrix?

• ( 3, 4, 9, 6 )

• ( 3, 4, 9, -6 )

• ( -6, 9, 4, 3 )

• ( 6, 9, 4, 3 )

Solve the system using matrices
x + 2y = 2
5x - 6y = - 54

• (-6, 4)

• (-8, 4)

• (8, 4)

• (6, 4)

Solve the system.  Write the matrix equation on your own paper.
-5x + 5y = -10
-7x + 4y = 13

• (-7, -5)

• (-7, -9)

• (7, -9)

• (-7, 5)

Solve the matrix equation using inverse equations.

• A

• B

• C

• D

Solve the matrix equation using inverse equations.

• A

• B

• C

• D