Aboat whose speed in 15km/hr in still water goes 30 km downstream and come back in a total of 4 hours 30 minutes. the speed of the stream(in km/hr) is

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.