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OpenStudy (anonymous):
What is the value of Dy in the following system? 4x – 3y = –14 2x + y = –2 –36 –2 10 20 i got -2?
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OpenStudy (turingtest):
no, that's not right rewrite the coefficients of the system as a matrix Dy is the determinant of that coefficient with the y-column replaced by the answer column
OpenStudy (turingtest):
|dw:1341174692196:dw|replace the y-column (the second column) with the answers and take the determinant
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