Fill in the boxes below with the numbers 1-5. The Substitution Method
Back substitute and solve for the first variable.
Substitute the expression you got into the other equation
Simplify and solve for the variable that remains.
Solve for either x or y in one of the equations.
Check your solution
DO NE

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