Iwould really like some . i don't understand how the hcf/gcf of −8y and 40 is 8 and how the hcf for −5y and −25 is -5 and not 5. 5 is a factor of both of the terms and it is greater than -5 so why is it not 5? can i explain this to me? you.

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8