SD(X )
The random variable X has the probability density function 
over [0, ?) .
Compute the quantity.
4.242641
Mathematics
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Find the domain.f(x) = ?-3x + 1?
A. {x? x is a real number and x ? -1} B. All real numbers C. {x? x is a real number and x ? 0.33333333} D. {x? x is a real number and x ? 3}
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Find the root. Assume that all variables represent positive numbers.
A. 7x6 B. 7x2 C. 7x3 D. 49x3
Mathematics
Solve for the specified variable. Assume that all other variables are nonzero.Ve = 
mv2; for v
A. v = ±
B. v = 
C. v = ±
D. v = 
Mathematics
Factor out the greatest common factor.20y - 60
A. 20y B. no common factor (except 1) C. 20(y - 3) D. 60
Mathematics