Which of the following sets of ordered pairs in the form (x, y) represent a function of x? 3 points {(2,4), (-2,4), (5,3), (7,4)} {(3,,,2), (-6,2)} {(9,2), (-3,4), (-3,1), (7,-4)} {(5,,-,-4), (6,1)show work  

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

What is the value of x? enter your answer in the box. photo attached.

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c