Matrices, solving systems, graphing inequalities

Can you multiply a 3 x 4 matrix with a 4 x 2 matrix?

• Yes

• No

Tags

CCSS.HSN.VM.C.8

Find B-A

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

Tags

CCSS.HSN.VM.C.8

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

Tags

CCSS.HSN.VM.C.6

CCSS.HSN.VM.C.8

find: B*A

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

Tags

CCSS.HSN.VM.C.8

Multiply

• 20     15    -10
  30     -5         0
• -20      15     -10
  30     -5          0
• 1        8       3
  11     4        5
• 20     -15     10
  -30         5        0  

Tags

CCSS.HSA.APR.A.1

Find A+B

• 8     10
  8      1 
• 12     25
  7     1
• 10     30
  0     1
• can't add two together because the rows dont match columns

What is the inverse of the following matrix?
⌈4  −3⌉
⌊12  3⌋

• ⌈1/16  1/16⌉
  ⌊-1/2  1/12⌋
• ⌈4/48  -3/48⌉
  ⌊12/48  3/48⌋
• ⌈2/24  −3/48⌉
  ⌊-6/48  3/48⌋
• ⌈3/48  3/48⌉
  ⌊-12/48  4/48⌋

Solve given equations by matrix method:

• x=-1

  y=2

  z=-2

• x=2

  y=1

  z=-1

• x=-2

  y=-1

  z=-2

• x=2

  y=2

  z=-1

Evaluate the determinant of the matrix.

• -40

• -98

• 52

• 12

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

Tags

CCSS.8.EE.C.8A