If y − 1 = 4x, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?
a. {(1, 4), (2, 8), (3, 12)}
b. {(4, 1), (8, 2), (12, 3)}
c. {(0, 1), (1, 5), (2, 9)}
d. {(1, 0), (5, 1), (9, 2)}

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 moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

P= price tax is 4% added to the price. which expression shows the total price including tax?