Adding and Subtracting Scalar Matrices

Given these matrices find C - D

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• NA

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

Given these matrices find B - A

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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

What do w, x, y and z equal in this matrix subtraction?

• 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

Find B-A

• -4     0
  6     -1

• 1     0
  1     -4

• 4       0
  -6     1

• not possible because rows do not match columns

Find Z - W

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• Does Not Exist

• A

• B

• C

• D