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OpenStudy (anonymous):
1.Every system of linear equations with 4 equations in 7 variables (unknowns) has infinitely many solutions. 2.Every homogeneous system of linear equations with 4 equations in 7 variables must have a 3-parameter family of solutions. 3.Every homogeneous system of linear equations with 7 equations in 7 unknowns has a unique solution. 4.No system of linear equations with 7 equations in 4 variables has a solution. 5.Every system of linear equations with 7 equations in 7 variables and whose matrix of coefficients is invertible has a unique solution. Which is/are true?
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OpenStudy (loser66):
1 is true (only)
OpenStudy (anonymous):
actually it's 5
OpenStudy (loser66):
yes, 5 is true
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