Matrices Test

• 12 8

  6 5

• 20 6

  4 3

• 10 12

  8 6

• 20 12

  8 6

• 40 34

  -8 45

• 40 22

  -6 39

• 58 34

  -8 45

• 58 22

  -6 39

• 10

• -7

• 7

• -10

• 6

• 10

• 4

• 16

• 1 -6

  -4 12

• 17 -12

  4 12

• 17 -6

  -4 12

• 1 -12

  4 -12

What is a square matrix?

• A matrix that has the same amount of rows and columns

• A matrix with no rows

• A matrix with no columns

• A matrix with 6 rows

When can matrices be added or subtracted?

• Only if they are square matrices

• They can never be added or subtracted

• They can anytime

• They must have the same dimensions

Is the sum defined?

• Yes, matrices can always be added

• No, because the matrices do not have the same dimensions

• No, because you cannot add positive and negative numbers

• Yes, the answer is 3

If Matrix A has dimensions 3x7 and Matrix B has dimensions 7x8, then what are the dimensions of Matrix AB?

• 7x7

• 3x7

• 3x8

• 7x8

• 15 15

  0 36

• 2 -8

  -3 9

• -15 15

  0 -36

• -15 -15

  0 -36