How much is 28463+98642-98= ?

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Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

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

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction