Matrix Test Review

What is the name of each entry of a matrix?

• Row

• Element

• Dimension

• Rectangle

How many columns are in a 5 x 4 matrix?

• 5

• 4

• 20

• 9

Perform the indicated operation

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• not possible

How would a scalar multiplication be carried out for a matrix?

• Add the Scalar to every element in the matrix

• Dot product the rows of one matrix with the columns of the other matrix

• Multiply every element with the scalar to create a new matrix

• subtract the elements in the first matrix from the elements of the second matrix

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You can add a 2X3 matrix by which matrix?

• 2X2

• 2X12

• 3X12

• 2X3

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 do m, n, p and q equal in this scalar matrix multiplication?

• 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

What do w, x, y and z equal in this matrix subtraction?

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

Perform the matrix multiplication, if possible.

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• 
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• Cannot be multiplied, dimensions not compatible.