HELP ME PLEASE I NEED HELP WITH THIS

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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