What is the answer to the question mx+2nx=p for x

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?