Julio says, "If you subtract 18 from my number and multiply the difference by - 3, the result is - 15." What is Julio's 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.

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 .is he correct? explain why or why not

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.