Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution. 6x - y - 6z=-21 -4x + 7z= 30 2y + z= 12
A. (-3, 6, 3)
B. (3, 6, 3)
C. (-3, 3, 6)
D. (3, 3, 6)
Answer: D
Mathematics
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Simplify completely.
A. - 
B. 
C. - 
D. 
Mathematics
Solve using matrices. x + y + z - w = 9 w + x + y - z = 1 2x + 3y + z + w = 183w - x + y + 2z = 12
A. (0, 3, 0, 2) B. (1, 3, 2, 5) C. (2, 3, 5, 1) D. (3, 2, 1, 5)
Mathematics
Find the average rate of change illustrated in the graph.
Year
A. -$3000.00 per year B. $4000.00 per year C. $3000.00 per year D. -$4000.00 per year
Mathematics
Write the number as an improper fraction.8
A. 
B. 
C. 
D. 
Mathematics