Greenrune113 Greenrune113
  • 01-05-2018
  • Mathematics
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Q9 Q9.) Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.

Q9 Q9 Select the correct choice below and if necessary fill in the answer box to complete your choice class=

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musiclover10045
musiclover10045 musiclover10045
  • 01-05-2018
the first step is to find the determinant of the matrix:

using ad-bc you get (-1*3) -  (-5*5) = = -1*3 + 5*5 = 22

now the numbers inside the matrix become fractions with the determinant as the denominator
 so you get -1/22, 5/22, -5/22 and 3/22

and replace them in reverse order

3,22, -5/22 , 5/22, -1/22

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