Quiz about Solving Matrix Equations

Question 1

Question 1.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 2

Question 2.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 3

What is A^-1?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 4

What is the inverse of this matrix?

Accepted Answer

_{(1/25) (-4/25)}
_{(3/25) (13/25)}

Answer

_{(1/5) (-4/5)}
_{(3/5) (13/5)}

Answer

_{(6/25) (-2/25)}
_{(2/25) (9/25)}

Answer

_{(1/150) (-4/150)}
_{(3/150) (13/150)}

Question 5

What do w, x, y and z equal in this matrix equation?

Accepted Answer

w = 13, x = 4, y = 11, z = 23

Answer

w = 13, x = 4, y = 7, z = 23

Answer

w = 13, x = -4, y = 11, z = 23

Answer

w = 13, x = 4, y = 11, z = 17

Question 6

Find 2B-5A

Accepted Answer

Answer

D.

Question 7

Solve:
-4x - 5y - z = 18
-2x - 5y - 2z = 12
-2x + 5y + 2z = 4

Accepted Answer

(-4, 0, -2)

Answer

(4, 0, -2)

Answer

Many Solutions

Answer

I did not get any of the answers above so I am assuming none of the above.

Question 8

Solve the system. Write the matrix equation on your own paper.
5x + 8y = -12
3x + 5y = -7

Accepted Answer

(-4, 1)

Answer

(1, -10)

Answer

No solution

Answer

(1, 10)

Question 9

Find 3B - 2A

Accepted Answer

[14 5]

[-11 3]

Answer

[22 25]

[17 3]

Answer

[-14 5]

[11 -3]

Answer

none of these

Question 10

Find 2A-3B

Accepted Answer

-14 -5

11 -3

Answer

-3 17 -1

Answer

1 01 -4

Answer

-4 06 -1

Question 11

Accepted Answer

x = -1 , y = 2

Answer

x = 1 , y = -2

Answer

x = 5, y = 4

Answer

x = 0 , y = 2

Question 12

Accepted Answer

x = 50 , y = -148

Answer

x = 100, y = 60

Answer

x = -98, y = -3

Answer

x = 49, y = -150

Question 13

Accepted Answer

x = 24 , y = 41

Answer

x = 14, y = 49

Answer

x = 14, y = 41

Answer

x = 24 , y = 49

Question 14

Accepted Answer

x = 0, y = 8

Answer

x = 8 , y = 0

Answer

x = -8 , y = -8

Answer

x = 0, y = 0

Question 15

Find the values of m and n.

Accepted Answer

m = 3, n = -5

Answer

m = 11, n = -5

Answer

m = 3, n = -4

Answer

m = 11, n = -4

Question 16

Solve the following system using matrices, as in the video.
$$-x-5y+z=17$$
$$-5x-5y+5z=5$$
$$2x+5y-3z=-10$$

Accepted Answer

(-1, -4, -4)

Answer

(1, 4, 4)

Answer

(-1, 4, 4)

Answer

(1, -4, -4)

Question 17

Solve the following system using matrices, as in the video.
$$x-6y+4z=-12$$
$$x+y-4z=12$$
$$2x+2y+5z=-15$$

Accepted Answer

(0, 0, -3)

Answer

Infinitely Many Solutions

Answer

No Solution

Answer

(0, 0, 0)

Question 18

Solve the following system using matrices as in the video.
$$4r-4s+4t=-4$$
$$4r+s-2t=5$$
$$-3r-3s-4t=-16$$

Accepted Answer

(1, 3, 1)

Answer

(1, -3, -1)

Answer

(-1, 3, 1)

Answer

(-1, -3, -1)

Question 19

Find 3(C - D).

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Solving Matrix Equations

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