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anonymous

  • one year ago

please help i got these questions wrong ! MEDAL!

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  1. anonymous
    • one year ago
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    #1Can you multiply a 4 x 2 and a 3 x 4 matrix? Explain. Select one: a. Yes. You will end up with a 4 x 3 matrix. Incorrect b. Yes. You will end up with a 4 x 4 matrix. c. No. The matrices will result in a square matrix. d. No. The answer does not exist.

  2. jim_thompson5910
    • one year ago
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    |dw:1437703074453:dw|

  3. jim_thompson5910
    • one year ago
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    |dw:1437703089170:dw|

  4. anonymous
    • one year ago
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    so then i would be d right ? or am i wrong ?

  5. jim_thompson5910
    • one year ago
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    if matrix A is 4x2 and matrix B is 3x4, then A*B does not exist. It is not possible to multiply this way

  6. jim_thompson5910
    • one year ago
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    correct

  7. anonymous
    • one year ago
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    awsome thankyou so much do you have time for the rest ?

  8. jim_thompson5910
    • one year ago
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    how many more?

  9. anonymous
    • one year ago
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    Two more

  10. jim_thompson5910
    • one year ago
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    sure, go for it

  11. anonymous
    • one year ago
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    #2 Which dimension determines the product matrix dimension? Select one: a. The inner dimensions b. The outer dimensions c. The cross-multiplied dimensions d. The first row of each matrix Incorrect

  12. jim_thompson5910
    • one year ago
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    let's say we had matrix A be of size 3x2 and matrix B of size 2x7

  13. jim_thompson5910
    • one year ago
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    A*B is defined because the inner dimensions match |dw:1437703383382:dw|

  14. jim_thompson5910
    • one year ago
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    A*B would be 3x7 because these are the outer dimensions |dw:1437703430691:dw|

  15. jim_thompson5910
    • one year ago
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    |dw:1437703487567:dw|

  16. anonymous
    • one year ago
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    im a bit confused forgive me if i seem dumb but then wich one the product matrix dimension ?

  17. jim_thompson5910
    • one year ago
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    A*B is considered the product matrix

  18. jim_thompson5910
    • one year ago
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    3x7 is the dimension of A*B

  19. jim_thompson5910
    • one year ago
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    3x7 ---> 3 rows, 7 columns

  20. anonymous
    • one year ago
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    so it would be B outer dimensions?

  21. jim_thompson5910
    • one year ago
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    yeah

  22. anonymous
    • one year ago
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    alrighty i see your good ! heres the last

  23. anonymous
    • one year ago
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    The product of a 3 x 3 and a 6 x 6 matrix would be: Select one: a. 3 x 6 Incorrect b. 6 x 6 c. 3 x 3 d. Does not exist

  24. jim_thompson5910
    • one year ago
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    you tell me (hint: look at the first problem we went over)

  25. anonymous
    • one year ago
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    ahh so d ?

  26. jim_thompson5910
    • one year ago
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    why D?

  27. anonymous
    • one year ago
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    mmmm isnt it because the inner dimensions do NOT match. They need to be the same number to multiply the matrices

  28. jim_thompson5910
    • one year ago
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    correct, the 3 and 6 don't match so A*B doesn't exist

  29. anonymous
    • one year ago
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    awsome thankyou so much for your help ! (:

  30. jim_thompson5910
    • one year ago
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    glad to be of help

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