Scalar and Matrix Multiplication

Question 1

Choose one:

Revolt · Accepted Answer

3 x 1

Question 2

b2 =

Revolt · Accepted Answer

33

Question 3

b3 =

Revolt · Accepted Answer

6

Question 4

Find the product of D = BA. d11 = ⇒ 0 d12 = d21 = d22 =

Revolt · Accepted Answer

Part 2: 6; Part 3: 1; Part 4: -4

Question 5

Which of the following statements are true about scalar multiplication of matrices?

Revolt · Accepted Answer

You can multiply a matrix of any size by a scalar.; For any matrix A, 1 × A = A.; You can scale geometric figures using scalar multiplication.; Scalar multiplication is a shortcut for repeated addition of the same matrix.

Question 6

mc001-1.jpg

Revolt · Accepted Answer

mc001-3.jpg

Question 7

Which products can be found by matrix multiplication?

Revolt · Accepted Answer

BA; CB; DE; EF

Question 8

Given the matrices: What is the size of the product C = AB? x

Revolt · Accepted Answer

Part 1: 2; Part 2: 2

Question 9

The following transformation uses both scalar and matrix multiplication.What are the coordinates of the resulting figure?

Revolt · Accepted Answer

(0, 0), (0, –8), (–4,–8), (–8,0)

Question 10

Given that AI = A, if A is a 3 x 3 matrix, what is the identity matrix?

Revolt · Accepted Answer

mc001-4.jpg

Scalar and Matrix Multiplication Answers

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