# 4-7 Operating With Matrices

8 Questions | Total Attempts: 79  Settings  A quiz about math and matrices chapter 4 in Algebra 2 books.

Related Topics
• 1.
What is Scalar Multiplication?
• A.

The constant used to multiply into a matrix.

• B.

The operation of multiplying the matrix by another matrix.

• C.

The operation of multiplying the scalar to a matrix using distribution.

• 2.
When can you add or subtract matrices?
• A.

When they have the same numbers in each matrix.

• B.

Only when its an equal matrix.

• C.

Only when the dimensions are the same.

• 3.
What row and column is the letter Z? | A B C D  F | | O Y X  K V |   | W Q Z U P |
• A.

2nd row,3rd column

• B.

1st row, 5th column

• C.

3rd row, 4th column

• D.

3rd row, 3rd column

• 4.
Going in Alphabetical order which scalar do you multiply the W matrix by?A= [ 4 5 8 9 2]   C= [ 7 8 4 9 2]    X= [ 2 5 9 6]   W= [ 4 5 8 9]                                                      [ 4 8 7 2]         [ 2 5 8 7]Scalars:  5  4  8  9
• A.

8

• B.

4

• C.

9

• D.

5

• 5.
Addition: A+B          A=[ 4 5 6 ]    +    B=[ 4 -8 6]                                   [ 2 7-3 ]              [ 8 5  7]
• A.

[ 8 -2 12] [ 12 10 4]

• B.

[ 8 -3 12] [ 10 12 4]

• C.

[ 8 3 12] [10 12 4]

• D.

None of the above

• 6.
If Y= [ 5 -6], find 7Y        [-8  7]
• A.

[35 -42] [-56 49]

• B.

[35 42] [-56 49]

• C.

[35 40] [56 49]

• D.

None of the above

• 7.
If X=[ 5 -4 6 8] and Y= [ 2  3 -5 4] , find 2X+3Y       [-8  7 3 9]             [ 4  8  2 6]
• 8.
Perform the indicated matrix operation if matrix does not exist write impossible.a)                                                                       b) [ 5  4  6 2] + [ 4  5  6 8 ]                                          [ -5  6 3]  - [ 5 -8 10]                   [ 5  7  8  3]                                          [ 2 -4 -6]    [ -2 5 12]c) 10C - 5D                                                      d) [ 1/2  6  3]  +  [ 1/2  4  9]     C=[ 2 -5 -8 7]       D=[ 6 5 8 3]                          [ 3  3/2  9]      [ 4 -3/2  7]         [ -3 5 8 -4]     -     [ -5 4 3 6]         [  4 2 3 10]          [ 12 5 7 4]