Systems of Equations Matrices

In Matrix R (pictured) what element is in the second row, third column?

• 8

• 9.01

• 6

• 1

What is the solution?

• (1, -1)

• (-1, 1)

• (0, -2)

• (2, 0)

Solve by elimination:
9x-4y=7

x-4y=-17

• (-1,5)

• (-7,5)

• (7,5)

• (3,5)

In Matrix R (pictured) what element is a₂₃?

• 8

• 9.01

• 6

• 1

• a

• b

• c

• d

Solve the system by inverting the coefficient matrix and using (A^-1)(x)=b. Type your answer in (x1, x2, x3) format.

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Solve the linear systems together by using the values of b for two separate systems, then reducing an appropriate augmented matrix to reduced row echelon form. Write your answer as (x1, x2), (x1, x2) form.

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Use matrices to solve the system of equations for the y-coordinate.

• y = -7

• y = -3

• y = 7

• x = -3

Solve the system using matrices.

• (5, -6, 3)

• (2, 3, -1)

• (-4, 2, 5)

• No Solution