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MATH 140 College Algebra
Quiz 5
Student Name _____________________________________ Section ___ Date _______
Systems of Linear Equations, Matrices and Determinants
Select the correct answer or enter the answers in the spaces provided.
(1)
(5, 2)
Solve the system of linear equations by substitution.
+ x + 4 y = + 13
− x − 3 y = − 11
(5, 2)
(2)
(2/3, 1/3)
(2/3, 1/3)
Solve the system of linear equations by elimination.
1x + 4y = 2
2x − 1y = 1
(3) (105/8, -31/8), Quadrant IV
Determine the Quadrant, in the Cartesian Coordinate System, that
contains the solution to this system.
3 x + 5 y = + 20
1 x + 7 y = − 14
(105/8, -31/8) Quadrant IV
Also, sketch the graph of the system using the provided
coordinate grid. Label the axes and scale the grid accordingly.
Label the point of intersection.
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Form A
1
MATH 140 College Algebra
Quiz 5
Student Name _____________________________________ Section ___ Date _______
(4)
0
For this linear system, determine the deter...