Find the product. Use the FOIL method.(x + 9)(-4x - 8)
A. -4x2 - 44x - 72
B. -4x2 - 72x - 44
C. -4x2 - 44x - 44
D. -4x2 - 46x - 72
Answer: A
Mathematics
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Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is between 780 and 840?
A. approximately 95% B. approximately 34% C. approximately 81.5% D. approximately 68% E. none of these
Mathematics
Find all complex-number solutions by completing the square.y2 - 4y = -28
A. -2 ± 2i
B. 2 ± 2
C. 2 ± 2i
D. 2 ± i
Mathematics
Find the slope of the line.3x - 2y = 9
A. 
B. - 
C. - 
D. - 
Mathematics
Find the indicated limit if it exists.
A. - 
B. does not exist
C. - 
D. - 
Mathematics