Write an explicit formula for the sequence -3, 1, 5, a. an = -3 + 4(n-1) b. an = -3 + 4n c. an = -3 + (n-1) d. an = -3 + 4(n+1)

Solve the system of equations. y= 2x y= x^2 - 15

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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