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.2x - 2y + 3z = -7x + 2y - z = 102y + z = 1
A. ?
B. {(3, 11, -11)}
C. {(-3, 2, 9)}
D. {(3, 2, -3)}
Answer: D
Mathematics
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Color the map with four colors. No two areas with a common border can have the same color.
What will be an ideal response?
Mathematics
For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = 3 - 2x; g(x) = -8x + 2;
Find f + g.
A. (f + g)(x) = 6x + 5; (-?, 
? 
, ?)
B. (f + g)(x) = -5x; (-?, ?)
C. (f + g)(x) = -10x + 5; (-?, ?)
D. (f + g)(x) = -8x + 3; (-?, 
) ? (
, ?)
Mathematics
Use a graphing calculator to graph the piecewise-defined function, using the window indicated.
A. 
B. 
C. 
D. 
Mathematics
Find the vertical asymptotes of the rational function.f(x) = 
A. x = - 
, x = 1
B. x = 
, x = -1
C. x = - 
, x = 1
D. x = 
, x = -1
Mathematics