4.2 Multiplying Matrices

Select all true statements:

• Matrix B is a row matrix.

• Matrix C and F have the same order.

• FA exists (as in NOT undefined).

• The order of matrix A is 1 x 2

Select all true statements:

• D is a square matrix

• The order of matrix D is 4 x 5

• The order of matrix D is 5 x 4

• D has 4 rows and 5 columns.

Select all true statements:

• Matrix MN is defined

• Matrix NM is defined

• Both matrices M and N have the order 2 x 2

• Both matrices M and N are square matrices

Determine the dimension of the new matrix.

• Can't multiply them

• 4 x 2

• 3 x 3

• 4 x 3

These matrices are being multiplied. Determine the dimension/size of the new matrix. 

• Can't multiply them

• 4  x  2

• 3  x  3

• 4  x  3

Find the product of the two matrices.

• 1   2 6   -8

• -3   -5 -5   -11

• -2     8 -6   -12

• 2  -3 5   -2

Matrix multiplication is not defined for:

• PQ

• SS

• SP

• PS

• 
• 
• 
• 

Find the product of the two matrices.

• 17   12
  25   18
• 8   9
  12   6
• 6   6
  7   5
• 12   10
  10   12

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