What does c equal
?6c+14= -5c+4+9c

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.

For the equations below which statement is true ?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)