Evaluate the expression.xy - x2 when x = - 
and y = -
A. 
B. - 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the probability that the rainfall is less than the expected value of the rainfall.
A. 0.500 B. 0.447 C. 0.445 D. 0.489
Mathematics
Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
A. 12.649 m B. 80 m C. 160 m D. 20 m
Mathematics
Solve and graph the solution set.-3(5x - 7) < -18x + 9
A. {x|x< -4} or (-?, -4)
B. {x|x < -18} or (-?, -18)
C. {x|x > -4} or (-4, ?)
D. {x|x > -18} or (-18, ?)
Mathematics
Determine whether the matrices are inverses.
, 
A. Yes B. No
Mathematics