Determine whether the statement is true or false. If it is true, explain why it is true. If it is false, give an example to show why it is false.
?
If f is a probability density function of a continuous random variable x in the interval 
, then the expected value of x is given by 
.
What will be an ideal response?
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Solve by the substitution method. If the system is inconsistent or dependent, say so.x + y = 8x + y = 7
A. (0, 15) B. (8, 7) C. (0, 0) D. Inconsistent
Find the equation of the line passing through the indicated two points. Write the equation in slope-intercept form.(3, -9) and (9, 7)
A. y = 
x - 
B. y = -2x - 3
C. x = 3
D. y = 
x - 17
Solve the system by graphing.
A. (1, 0) B. (0, 0) C. (0, 1) D. (1, 1)
Tell whether the expression is a monomial. If it is, name the variable(s) and coefficient, and give the degree of the monomial.
A. Monomial; variable x; coefficient 13; degree -1 B. Monomial; variable x; coefficient 13; degree 0 C. Monomial; variable x; coefficient 13; degree 1 D. Not a monomial