If you graph both sides of the equation 2(2x + 3) = 4x + 6, what will the graph look like?

the graphs never intersect.
the graphs intersect at a single point.
the graphs are identical and intersect at infinitely many points.
the graphs intersect at exactly two points.

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