Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62
B. 0.26
C. 0.22
D. 0.50
Answer: A
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If the equation represents a hyperbola, find the center, foci, and asymptotes. If the equation represents an ellipse, find the center, vertices, and foci. If the equation represents a circle, find the center and radius. If the equation represents a parabola, find the focus and directrix. y2 - x2 - 4y + 10x - 57 = 0
A. C: (5, 2); F: (0, 2 + 6
), (0, 2 - 6
); A: y - 2 = x - 5, y - 2 = -(x - 5)
B. C: (5, -4); F: (6
, 0), (- 6
, 0); A: y =
x, y = - 
x
C. C: (5, 2); F: (5, 2 + 6
), (5, 2 - 6
); A: y - 2 = x - 5, y - 2 = -(x - 5)
D. C: (-1, 2); F: (6
, 0), (- 6
, 0); A: y = x, y = -x
Solve the problem.How many spanning trees does the following network have?
A. 18 B. 10 C. 17 D. 19 E. none of these
Find an equation of the line having the given slope and containing the given point. m = 0, (-10, -2)
A. x = -10 B. y = -2 C. x = -2 D. y = -10
Solve the problem.Solve the formula P = s1 + s2 + s3 for s3.
A. s3 = P + s1 + s2 B. s3 = s1 + s2 - P C. s3 = P - s1 - s2 D. s3 = s1 + P - s2