AnswersCUSD Advanced Math B 5.0Scalar and Matrix Multiplication

Scalar and Matrix Multiplication Answers

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1
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Choose one:

A
1 x 3
B
3 x 1
C
3 x 3
3

b3 =

Answer:

6

4

c12 =

Answer:

3

5

c21 =

Answer:

3

6

c22 =

Answer:

-3

7

Find the product of D = BA.

Answers:
Blank 1:6
Blank 2:1
Blank 3:-4
8

d12 =

Answer:

6

9

d21 =

Answer:

1

10

d22 =

Answer:

-4

11

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

A
You can multiply a matrix of any size by a scalar.
B
For any matrix A, 1 × A = A.
C
For any scalar r, rI = I, where I is the identity matrix.
D
You can scale geometric figures using scalar multiplication.
E
Scalar multiplication is a shortcut for repeated addition of the same matrix.
F
Scalar multiplication is not possible for matrices that are not square.
12

mc001-1.jpg

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
18

Multiplies every element of a matrix by the same number:

Answers:
Selection 1:Scalar
Selection 2:Neither
Selection 3:Matrix
Selection 4:Matrix
20

Multiply: b1 = b2 = b3 =

Answers:
Blank 1:33
Blank 2:6

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