# true or false system comprising two linear equations two variables has unique solution if an

true or false system comprising two linear equations two variables has unique solution if an.

1. True or false: A system comprising two linear equations in two variables has a unique solution if and only if the straight lines represented by the equations are nonparallel.
2. True or false: Suppose the straight lines represented by a system of two linear equations in two variables are parallel to each other. Then the system has infinitely many solutions.
3. True or false: If A and B are matrices of the same order, then .
4. True or false: If A and B are matrices such that AB and BA are both defined, then A and B must be square matrices.
5. True or false: If A is a square matrix with inverse and c is a nonzero real number, then .
6. True or false: If AX = B is a system of n linear equations in n unknowns and does not exist, then AX = B does not have a unique solution.

true or false system comprising two linear equations two variables has unique solution if an

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