1. Determine the value of x. Show your work and explain your thinking in full sentences. 40
x=
Explain:

Measures of the angle of r, 31 s (x+4) t (3x+9)

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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