What numbers add up to four and multiply to 9?

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 the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

The square root of 9x plus 7 plus the square rot of 2x equall to 7