Quiz about Matrix Multiplication + review

Question 1

Dimensions?

Accepted Answer

a

Answer

b

Answer

c

Answer

d

Question 2

Identify the dimensions.

Accepted Answer

1 x 4

Answer

0 x 4

Answer

4 x 1

Answer

4 x 0

Question 3

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 4

Can the operation be performed?

Accepted Answer

No

Answer

Yes

Question 5

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 6

Add.

Accepted Answer

Option D is correct

Answer

No Sum Exists

Answer

B.

Answer

C.

Question 7

Perform the scalar multiplication.

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 8

Perform scalar multiplication on the matrix

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 9

Which matrix product produces the given system?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 10

What must be true in order to MULTIPLY two matrices?

Accepted Answer

The #of columns of the 1st must equal the # of rows of the 2nd.

Answer

They must be square.

Answer

The dimensions must be equal.

Answer

The determinant can't equal 0.

Question 11

You can multiply a 2X3 matrix by which matrix?

Accepted Answer

3X12

Answer

2X2

Answer

2X12

Answer

2X3

Question 12

When a 3x6 matrix is multiplied by a 6x5 matrix, what will the dimensions of the product be?

Accepted Answer

3x5

Answer

6x6

Answer

3x6

Answer

5x6

Question 13

If the matrices can be multiplied, what dimension is the product? If not, write undefined.

Accepted Answer

( 3 x 2 )

Answer

undefined

Answer

( 3 x 1 )

Answer

( 1 x 2 )

Question 14

If the matrices can be multiplied, what dimension is the product? If not, write undefined.

Accepted Answer

undefined

Answer

( 3 x 1 )

Answer

( 3 x 2 )

Answer

( 3 x 3 )

Question 15

If the matrices can be multiplied, what dimension is the product? If not, write undefined.

Accepted Answer

( 2 x 2 )

Answer

( 6 x 2)

Answer

( 2 x 6 ) )

Answer

( 3 x 2 )

Question 16

If the matrices can be multiplied, what dimension is the product? If not, write undefined.

Accepted Answer

( 2 x 4 )

Answer

undefined

Answer

( 2 x 2 )

Answer

( 4 x 2 )

Question 17

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 18

Multiply.

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

No Product Exists

Question 19

Perform the operation if possible.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 20

Perform the operation if possible.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Matrix Multiplication + review

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