Find (by inspection) the expected value and standard deviation of the random variable with the following density function: 
Enter your answer as just two numbers (a real number to one decimal place followed by a reduced fraction) separated by a comma, the first representing E(X) and the second representing 
.
Fill in the blank(s) with the appropriate word(s).
3.9, 1/7
Mathematics
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The table lists data that are exactly linear. (i) Find the slope-intercept form of the line that passes through these data points. (ii) Predict y when x = -1.5 and 4.6. 
A. y = 2.2x - 7.9; y = -11.2, y = 2.22 B. y = 2.2x + 7.9; y = 4.6, y = 18.02 C. y = 2.2x - 0.9; y = -4.2, y = 9.22 D. y = -2.2x + 7.9; y = 11.2, y = -2.22
Mathematics
Perform the matrix operation.Let C =
. Find (1/2) C.
A. 
B. 
C. 
D. 
Mathematics
Write as a percent. Round the percent to the nearest tenth if necessary.
A. 1.7% B. 60% C. 16.7% D. 27.8%
Mathematics
Find the indicated intercept(s) of the graph of the function.x-intercepts of f(x) = 
A. (-1, 0) B. (1, 0) C. (9, 0) D. none
Mathematics