Coefficient Matrix

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 the value of m, n, p and q.

• 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

Find the value of x and y if

• x=2 , y=5

• x=3, y=3

• x=3, y=5

• x=5, y=3

Identify the coefficient matrix for the following system.

• 
• 
• 
• 

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns

a₂₃ + a₁₂ - a₃₁ + a₄₃?

• -2

• -1

• -3

• 0

Dimensions?

• a

• b

• c

• d

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

In Matrix R (pictured) what is the value of element R_3,2

• 8

• 9.01

• 6

• 1

• 10

• 0

• 1

• 4