Matrices Review

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Find B-A

• -3     1
  7     -1
• 1     0
  1     -4
• -4       0
  6     -1
• not possible because rows do not match columns

Dimensions?

• a
• b
• c
• d

Tags

CCSS.HSN.VM.C.6

• x=-3
  y=4
• x=-2
  y=5
• x=3
  y=-4
• x=2
  y=-5

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3

Tags

CCSS.HSN.VM.C.8

What is the determinant of this matrix?

• 5
• 25
• -25
• 1

Solve the system
-x + y = 5
x - 5y = -9

• x = 3, y = 8
• x = 1, y = 2
• x = -4, y = 1
• x = 4, y = 9

Find the product.

• undefined
• -3   16
  17   12
  8   -10
• 3   12 
  -15  -8
  -1   -3

Multiply

• 1   2
  6   -8
• -3   -5
  -5   -11
• -2     8
  -6   -12
• 2  -3
  5   -2

find: B*A  (B x A)

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns