What is 5 over20 by simplifying fraction

Use the quadratic formula to solve 5x=6x^2-3,what are the values of x?

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’s the domain of this function? fastttt