Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable. 7x - 9y - z = -24 x - 3y - 5z = -54-2x + y + z = 7
A. {(3, 4, 9)}
B. ?
C. {(-3, 4, 6)}
D. {(3, 9, 4)}
Answer: A
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Write the fraction or mixed number as a percent. Write the percent as a simplified fraction or mixed number.
A. 5
%
B. 52
%
C. 77
%
D. 522
%
Solve the problem.The base of the closed cubelike surface is the unit square in the xy-plane. The four sides lie in the planes x = 0, x = 1, y = 0, and y = 1. The top is an arbitrary smooth surface whose identity is unknown. Let 
and suppose the outward flux through the side parallel to the yz-plane is 3 and through the side parallel to the xz-plane is -5. What is the outward flux through the top?
A. -2 B. 0 C. 2 D. Not enough information to determine
Graph the polynomial function. f(x) = 
- 
x4
A. 
B. 
C. 
D. 
Decide whether the ordered pair is a solution of the given system.(5, -6)x + y = -11x - y = 1
A. No B. Yes