There are 20 houses on Rainbow Street. 45% of the houses have holiday decorations in their yard.
How many houses have decorations?

Help?

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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Which of the following will form the composite function?