Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z. x + y + z = 7 x - y + 2z = 7
A. (8, -3, 2)
B. 
C. (-3z + 14, 2z - 7, z)
D. (4, 1, 2)
Answer: B
Mathematics
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What value of c makes f(x) continuous at x = 4?
A. 4 B. 2 C. -2 D. -8
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Find the perimeter.
A. 89 m B. 138 m C. 178 m D. 1960 m
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Graph the parabola and label the vertex. Find the y-intercept.y = -3
2 - 5
A. vertex (
, 5), y-intercept (0, -95.75)
B. vertex (
, -5), y-intercept (0, -95.75)
C. vertex (
, -5), y-intercept (0, 95.75)
D. vertex (- 
, -5), y-intercept (0, -95.75)
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For the given matrix A, find k such that Nul A is a subspace of ?k and find m such that Col A is a subspace of ?m. A = 
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Mathematics