Find the sum or difference of (7-8i)+(-2-3i)

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

What are the solutions of the following system? y=-2x^2 y=x-2