Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.4x - y + 3z=12x + 4y + 6z=-325x + 3y + 9z=20
A. {(2, -7, -1)}
B. {(8, -7, -2)}
C. ?
D. {(-8, -7, 9)}
Answer: C
Mathematics
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Factor completely.x2 + 2xy - 24y2
A. (x - 6y)(x + y) B. (x + 6y)(x - 4y) C. (x - 6y)(x + 4y) D. (x - y)(x + 4y)
Mathematics
Find the foci of the given hyperbola.y2 - 25x2 = 25
A. (0, 5), (0, -5)
B. (0, 
), (0, -
)
C. (
, 0), (-
, 0)
D. (5, 0), (-5, 0)
Mathematics
Find the probability.A student will take a 12-question "true or false" test. If he must guess on every question, what is the probability that he answers 10 questions correctly?
A. 
B. 
C. 
D. 
Mathematics
The graph of a quadratic function is given. Find the standard form of the function
A. f(x) = -(x - 1)2 - 4 B. f(x) = (x + 1)2 - 4 C. f(x) = -(x + 1)2 + 4 D. f(x) = -(x + 1)2 - 4
Mathematics