Three more than six times a number equals -5. what is the number?

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.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Solve the system of equations y= 3/2 - 1, -x+ y =-3