Which function has a vertex at the origin?
162) = (x + 4)^2
f(x) = x(x-4)
f(x) = (x – 4)(x + 4)
f(x)=-x^2

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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