Matrix Operations (Add, Subtract, Scalar, Multiply)

In Matrix R (pictured) what element is in the second row, third column?

• 8
• 9.01
• 6
• 1

Tags

CCSS.HSA.REI.C.8

What must be true in order to ADD two matrices?

• They must be square.

• The dimensions (size) must be equal.

• The determinant can't equal 0.

• The column of the 1st must equal the row of the 2nd.

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

Subtract (ignore the fact that I couldn't put matrix brackets in the answers)

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

Tags

CCSS.HSN.VM.C.8

Dimensions?

• a
• b
• c
• d

Find the values of m, n, p, 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 product.

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

Tags

CCSS.HSN.VM.C.8

Find B*A (Calculator highly recommended for this one!)

• 47 30

  9 5

• 17 15

  42 35

• 10 25

  7 1

• not possible because rows do not match columns

What is a Matrix?

• An equation of over 5 numbers or symbols

• An array of numbers or variables arranged in rows and columns

• A method of finding the n^th value of a series

• A complicated number system that permits you to enter alternate realities

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