Adding and Subtracting Scalar Multiplication of Matrices

Add

• 11    8
  -4     2

• 3     2
  -6    -6

• -3    2
  -4    -6

• 10    8
  -6    2

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

• m=8, n=9, p=-4, q=4 

• m=15, n = -45, p=20, q=-5

• m=20, n=-5, p=15, q=-45

• m=-5, n=20, p=-45, q=15

Simplify.

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• 

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

• m=15, n=-45, p=-4, q=4 

• m=15, n = -45, p=20, q=-5

• m=-20, n=-45, p=20, q=-45

• m=-15, n=20, p=-45, q=15

Perform the scalar multiplication. 

​ (a)   ​ (b)  

​ (c)   ​ (d)  

• -1

• 3

• 9

• -16

• -2

• 36

• 6

• -64

• -4

• -12

Find the values of w, x, y and z.

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

Given these matrices find D - A

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• 
• 
• NA

Given these matrices find C - D

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• 
• 
• NA

Find B-A

• -3     1
  7     -1

• 1     0
  1     -4

• -4       0
  6     -1

• not possible because rows do not match columns

Find the values of x, y and z.

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17