Matrix quiz 2

What must be true to add matrices?

• Same number of rows

• Same number of columns

• Same dimensions

• All of the above

Tags

CCSS.HSN.VM.C.8

What must be true of matrices when multiplying by a scalar?

• Rows must be less than columns

• Columns must be less than rows

• Must be a square matrix

• None of the above

Tags

CCSS.HSN.VM.C.7

Add these two matrices

• 10    -3    15
  -6      1     9

• 10    8    3
  -17   1    4
  12    5    0

• 10     8
  -17    1

• undefined

Tags

CCSS.HSN.VM.C.8

Find the determinant's value

• -18
• -23
• -2
• 2

Find the product.

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

Tags

CCSS.HSN.VM.C.8

• 5   -2
  -3    1
• -5   2
  3   -1
• -5   3
  2   -1
• 1   -3
  -2    5

Tags

CCSS.HSA.REI.C.9

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.HSN.VM.C.7

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

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

Tags

CCSS.HSN.VM.C.8

What are the dimensions of matrix A?

• 3x4

• 4x3

• 12

• 4