Perform the indicated operations.(-6x2y - xy) + (9x2y + 3xy)
A. 3x2y + 4xy
B. 3x2y + 2xy
C. 15x2y + 2xy
D. 15x2y + 4xy
Answer: B
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Write the negation of the proposition.Everyone is asleep.
A. Not everyone is asleep. B. Nobody is awake. C. Everyone is awake. D. Nobody is asleep.
A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.At least 500 hours
A. 5,000 B. 1,000 C. 2,500 D. 2,400
Solve the problem.The expression for figuring the average speed of a car is 
, where m is the number of miles traveled and h is the number of hours traveled. Evaluate the expression for a car that travels 
in 10 hours.
A. 49 mph B. 59 mph C. 55 mph D. 590 mph
Find the derivative of the function.
?
?
A. 
B. ?
C. ?
D. ?