4-7 Operating With Matrices

8 Questions

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4-7 Operating With Matrices

A quiz about math and matrices chapter 4 in Algebra 2 books.


Questions and Answers
  • 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]