Solving Systems Using Matrices

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

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)

Solve the system using matrices
x + 7y = - 21
9x + 7y = 35

• (7, -4)

• (-4, 7)

• (7, 4)

• (-4, -7)

Solve the system of equations using an inverse matrix: 2x + 3y = 7 and 4x + y = 9.

• The solution is x = 2 and y = 1.

• The solution is x = 1 and y = 2.

• The solution is x = 3 and y = 1.

• The solution is x = 1 and y = 1.

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

• (-6, 4)

• (-8, 4)

• (8, 4)

• (6, 4)

Solve the system by inverting the coefficient matrix and using (A^-1)(x)=b. Enter your answer as (x1, x2) format.

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