What is the solution to the system of equations? 6 x + 2 y = 6. 7 x + 3 y = 5.
(Negative 3, 2)
(Negative 1, 6)
(2, Negative 3)
(6, Negative 1)

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