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.x - 8y + z = 23x - y + 2z = 6
A. 
B. 
C. ?
D. 
Answer: A
Mathematics
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Graph.g(x) = -2x2 + 3
A. 
B. 
C. 
D. 
Mathematics
Match the function with its graph.f(x) = - 
A. 
B. 
C. 
D. 
Mathematics
Find the LCM of the expressions.2xy2, x3y
A. 4x3y2 B. 4x2y3 C. 2x3y2 D. 5x3y2
Mathematics
Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 + 4x - 7
A. vertex: (-2, -11);
x-intercepts: (-2 ± 
, 0);
y-intercept: (0, -7)
B. vertex: 
;
x-intercepts: (-4, 0) and (3, 0);
y-intercept: (0, -12)
C. vertex: (4, 0);
x-intercept: (4, 0);
y-intercept: (0, 7)
D. vertex: (-2, 3);
x-intercepts: none;
y-intercept: (0, 7)
Mathematics