If f is the variable, which mathematical sentence expresses the information below? the number of fish in the tank plus 6 more adds up to 15 fish. a. f + 15 = 6 b. 15f = 6 c. 6f = 15 d. f + 6 = 15

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

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.

Sections of prefabricated wood are each 5 1/3 feet long. how long are 7 1/2 sections placed end to end?