Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.x+ 3y+ 4z= -14 2y+ 3z= -7? z= -3
A. (-3, 1, -5)
B. (-5, -3, 1)
C. (-5, 1, -3)
D. No solution
Answer: C
You might also like to view...
Solve the problem.As Sunee improves her algebra skills, she takes 0.9 times as long to complete each homework assignment as she took to complete the preceeding assignment. If it took her 70 minutes to complete her first assignment, find how long it took her to complete the fifth assignment. Find the total time she took to complete her first five homework assignments. (Round to the nearest minute.)
A. 41 min; 241 min B. 46 min; 287 min C. 46 min; 241 min D. 41 min; 287 min
Solve the problem.A ladder x feet long leans against a house and makes an angle ? with the horizontal. The base of the ladder is 10 feet from the house. Then 
Use a reciprocal identity to rewrite this formula.
A. 
B. 10 sin ?
C. 
D. 10 sec ?
Solve the problem.The diagram shows the roads connecting four cities. Write a matrix to represent the number of routes between each pair of cities without passing through another city.WZ
XY
A. 
B. 
C. 
D. 
Find the transformation form of g.g(x) = x2 + 12x + 28
A. g(x) = (x - 6)2 - 8 B. g(x) = (x + 6)2 - 8 C. g(x) = (x + 6)2 + 8 D. g(x) = (x - 6)2 + 8