Asubmarine descended 1200 meters below the surface of the water. it then rose 800 meters and then descended 250 meters.

what was the submarine's net gain or loss in altitude? {note: m stands for meters}

a. -1200 m

b. -650 m

c. -400 m

d. 650 m

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.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36