Quiz about Adding, Subtracting, and Multiplying Matrices by Scalars

Question 1

What do m, n, p and q equal in this scalar matrix multiplication?

Accepted Answer

m=15, n = -45, p=20, q=-5

Answer

m=8, n=9, p=-4, q=4

Answer

m=20, n=-5, p=15, q=-45

Answer

m=-5, n=20, p=-45, q=15

Question 2

Find A+B

Accepted Answer

8 10 8 1

Answer

12 25 7 1

Answer

10 30 0 1

Answer

can't add two together because the rows dont match columns

Question 3

Find the values of x, y and z.

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 4

Find A+B

Accepted Answer

8 10 8 1

Answer

12 25 7 1

Answer

10 30 0 1

Answer

can't add two together because the rows dont match columns

Question 5

Question 5.

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Answer

E.

Question 6

Question 6.

Accepted Answer

b

Answer

a

Answer

c

Answer

d

Question 7

Calculate

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 8

find: B*A

Accepted Answer

47 30 9 5

Answer

17 15
42 35

Answer

10 25 7 1

Answer

not possible because rows do not match columns

Question 9

Find the product of the two matrices.

Accepted Answer

-3 -5
-5 -11

Answer

1 2 6 -8

Answer

-2 8
-6 -12

Answer

2 -3 5 -2

Question 10

Question 10.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 11

Bonus Point! 3A=?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 12

Perform the given operations

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 13

Find A-B

Accepted Answer

-4 0 6 -1

Answer

-3 1 7 -1

Answer

1 0 1 -4

Answer

not possible because rows do not match columns

Question 14

Find the product of the two matrices.

Accepted Answer

-3 16
17 12
8 -10

Answer

undefined

Answer

3 12
-15 -8
-1 -3

Question 15

These matrices are being multiplied. Determine the dimension/size of the new matrix.

Accepted Answer

Can't multiply them

Answer

4 x 2

Answer

3 x 3

Answer

4 x 3

Question 16

What must be true in order to ADD two matrices?

Accepted Answer

The dimensions must be equal.

Answer

They must be square.

Answer

The determinant can't equal 0.

Answer

The column of the 1st must equal the row of the 2nd.

Question 17

What are the dimensions of this matrix?

Accepted Answer

3 x 2

Answer

2 x 3

Answer

6 x 1

Answer

1 x 6

Question 18

Given these matrices find D - A

Accepted Answer

NA

Answer

A.

Answer

B.

Answer

C.

Question 19

Given these matrices find C - D

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

NA

Question 20

What is the value of the variable in the equation?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Adding, Subtracting, and Multiplying Matrices by Scalars

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