Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62
B. 0.26
C. 0.22
D. 0.50
Answer: A
Mathematics
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Solve the problem.A painter can finish painting a house in 5 hours. Her assistant takes 7 hours to finish the same job. How long would it take for them to complete the job if they were working together?
A. 2
hr
B. 
hr
C. 6 hr
D. 4 hr
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Without using a calculator, determine the value of the trigonometric function or state that the value is undefined.sin (405°)
A. 
B. - 
C. 
D. - 
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Identify the figure as a line, segment, or ray. Then use the correct symbol to name the figure.
A. 
B. line segment; 
C. line; 
D. line; 
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Simplify the expression, using only positive exponents in your answer.
A. 
B. 
C. 
D. 
Mathematics