What are the coordinates of the vertex of the graph of the function y = –x² + 6x –11?

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?

How would you describe the difference between the graphs of f(x) = 2x2 and g(x) = -2x2?