Find the general solution. If an initial condition is specifie 1. (x²+xy-y²) dx + xydy-0

Find the unknown value. 27. y varies jointly with x and the cube root of 2. If when x=2 and z=27,y=12, find y if x=5 and z=8.

Find the constant of proportionality. y is directly proportional to x. If x=30, then y=15.

The population P (in millions) of Texas from 2001 through 2014 can be approximated by the model P=20.913e0.0184t, where t represents the year, with t=1 corresponding to 2001. According to this model, when will the population reach 32 million?