Find the expected value and variance for the random variable whose probability density function is 
Enter just two reduced fractions of form 
(unlabeled) in the order E(X), Var(X) separated by a comma.
Fill in the blank(s) with the appropriate word(s).
7/2,3/4
Mathematics
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Write a general term an for the sequence. Assume that n begins with 1.
, 
, 
, 
, 
, . . .
A. an = 
B. an = 
C. an = 
D. an = 
Mathematics
Find the difference.- 254 - (-716)
A. 462 B. -970 C. -462 D. -362
Mathematics
Graph the set on the number line.
A. 
B. 
C. 
D. 
E. 
Mathematics
Solve the problem.The price of electric guitars has varied considerably in recent years. The data in the table relates the price P, in dollars, to time t, in years, where t = 1 corresponds to 1988. Use a cubic function fitted to the data to predict the price of an electric guitar in 1997. Average price, p, 
A. $670.48 B. $893.53 C. $827.42 D. $443.52
Mathematics