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OpenStudy (anonymous):
write the coefficient for the matrix for the system use it to determine if the system has a unique solution -5x+7y= -9 5x-7y=-5
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jimthompson5910 (jim_thompson5910):
If we have -5x+7y, then the coefficients are the numbers in front of the variables. So the coefficients are -5 and 7
jimthompson5910 (jim_thompson5910):
For 5x-7y=-5 the coefficients are 5 and -7
jimthompson5910 (jim_thompson5910):
Use these coefficients to make a 2x2 matrix
OpenStudy (anonymous):
No inverse exist so no unique solution right
jimthompson5910 (jim_thompson5910):
you are correct, the determinant is 0, which means that there are either no solutions or infinitely many solutions
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OpenStudy (anonymous):
thanks :)
jimthompson5910 (jim_thompson5910):
yw
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