The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(9 - 6z, -9 + 2z, z)}
B. {(9 - z, -9 + z, z)}
C. {(9, -9, z) }
D. {(9 + 6z, -9 - 2z, z)}
Answer: A
Mathematics
You might also like to view...
Simplify the algebraic expression.3m - 4m2 - 7m - 9m2
A. -4m - 13m2 B. -17m3 C. 3m - 7m - 4m2 - 9m2 D. -13m - 4m2
Mathematics
Find the limit.
ln (z
)
A. ln 2
B. ln 4
C. ln 
D. 0
Mathematics
An earthquake has a period of 
second and an amplitude of 
. Find its measure on the Richter scale. Round your answer to one decimal place.
?
A. 12.4 B. 4.7 C. 5.4 D. 10.8 E. 50.0
Mathematics
Solve the problem.Suppose the tip of the minute hand of a clock is 9 inches from the center of the clock. Determine the distance traveled by the tip of the minute hand in 10 minutes. Give an exact answer.
A. 6? in. B. 1.5? in. C. 9? in. D. 3? in.
Mathematics