Solve the system using Gaussian elimination.  5x - 7y - 5z =  8  9x + 6y + 4z =  6 20x - 28y - 20z = -7

A. {(x, y, z) 5x - 7y - 5z = -20}
B. {(4, 4, -1)}
C. ?
D. {(8, 6, -7)}

Answer: C

Mathematics

You might also like to view...

Sketch the given exponential curve.y = -5t

A.

B.

C.

D.

View
Mathematics

Sketch the graph of the pair of functions. Use a dashed line for g(x).f(x) = ,  g(x) =  - 2

A.

B.

C.

D.

View
Mathematics

Use the remainder theorem to find P(k).k = -3; P(x) = 7x4+ 8x3 + 6x2 - 7x + 66

A. 642 B. -1128 C. 792 D. 492

View
Mathematics

Find an equation for the line with the given properties.Parallel to the line x + 2y = 5; containing the point (0, 0)

A. y = 2
B. y = x
C. y = - x + 5
D. y = - x

View
Mathematics