Answer + ! lucia finds that (3x^2 + 3x + 5) + (7x^2 - 9x + 8) = 10x^2 - 12x + 13. what error did lucia make? a. she found the difference instead of the sum. b. she combined the terms 3x^2 and 7x^2 incorrectly. c. she combined the terms 3x and –9x incorrectly. d. she did not combine all like terms.

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