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1.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions: 
D)Â Â Â No solution
2.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions: 
D)Â Â Â No solution
3.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions: 
D)Â Â Â No solution
4.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions: 
D)Â Â Â No solution
5.     Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist.
A)Â Â Â one and only one solution: 
B)Â Â Â one and only one solution: 
C)Â Â Â one and only one solution: 
D)Â Â Â infinitely many solutions: 
E)Â Â Â Â No solution
6.     Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist.
A)Â Â Â One and only one solution:
B)Â Â Â One and only one solution: 
C)Â Â Â One and only one solution: 
D)Â Â Â Infinitely many solutions: 
E)Â Â Â Â No solution
7.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions:
D)Â Â Â No solution
8.     Solve the linear system of equations
A)Â Â Â Unique solution: 
B)Â Â Â Unique solution: 
C)Â Â Â Infinitely many solutions: 
D)Â Â Â No solution
9.     A system composed of two linear equations must have at least one solution if the straight lines represented by these equations are nonparallel.
A)Â Â Â false
B)Â Â Â true
10. Solve the linear system of equations
A)Â Â Â unique solution:
B)Â Â Â unique solution: 
C)Â Â Â infinitely many solutions: 
D)Â Â Â no solution
11. Indicate whether the matrix is in row-reduced form.
A)Â Â Â The matrix is not in row-reduced form.
B)Â Â Â The matrix is in row-reduced form.
12. Indicate whether the matrix is in row-reduced form.
     
A)Â Â Â The matrix is in row-reduced form.
B)Â Â Â The matrix is not in row-reduced form.
13. Indicate whether the matrix is in row-reduced form.
     
A)Â Â Â The matrix is not in row-reduced form.
B)Â Â Â The matrix is in row-reduced form.
14. Indicate whether the matrix is in row-reduced form.
     
A)Â Â Â The matrix is in row-reduced form.
B)Â Â Â The matrix is not in row-reduced form.
15. Indicate whether the matrix is in row-reduced form.
     
A)Â Â Â The matrix is in row-reduced form.
B)Â Â Â The matrix is not in row-reduced form.
16. Solve the system of linear equations using the Gauss-Jordan elimination method.
     
A)Â Â Â Â ( 0, 2 )
B)Â Â Â Â ( 8, 2 )
C)    ( 4, –6 )
D)    ( –2, 4 )
E)    ( 4, –2 )
17. Solve the system of linear equations using the Gauss-Jordan elimination method.
     
A)Â Â Â 
B)Â Â Â 
C)Â Â Â 
D)Â Â Â 
E)Â Â Â Â
18. Solve the system of linear equations using the Gauss-Jordan elimination method.
     
A)    ( 7, –3 )
B)    ( 6, –2 )
C)    ( 2, –6 )
D)    ( –6, 2 )
E)     ( –7, –2 )
19. Solve the system of linear equations using the Gauss-Jordan elimination method.
     
A)   ( 4, –14, –8 )
B)   ( –19, 4, 8 )
C)   ( 8, –14, –4 )
D)Â Â Â ( 14, 4, 8 )
E)    ( 14, –4, –8 )
20. Solve the system of linear equations, using the Gauss-Jordan elimination method.
     
A)Â Â Â 
B)Â Â Â 
C)Â Â Â 
D)Â Â Â 
E)Â Â Â Â 
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