Find the expected value and variance for the random variable whose probability density function is 
Enter just two reduced fractions (unlabeled) in the order E(X), Var(X) separated by a comma.
Fill in the blank(s) with the appropriate word(s).
1/3, 1/12
Mathematics
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Graph the parabola and show the focus and directrix.x2 = 24y
A. 
B. 
C. 
D. 
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Perform the necessary operations.5 - 4 - 11
A. 20 B. -2 C. 12 D. -10
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Make the indicated conversion within American units of weight.7.9 tons to pounds
A. 15,800 lb B. 7900 lb C. 1580 lb D. 126.4 lb
Mathematics
Find the solution to the system by addition (elimination) method. 6x + 4y = -10-6x - 10y = 34
A. (1, -4) B. (-6, - 4) C. (6, 4) D. (-1, 4)
Mathematics