What is the solution of 12x-7

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.

Is the square root of 4 plus the square root of 16 rational?

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?