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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Solve the problem.f(x) = 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 = -32 - 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 =  

A. k = 2, m = 2 B. k = 5, m = 5 C. k = 2, m = 5 D. k = 5, m = 2

Mathematics