Someone help me with these math questions ASAP

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.

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !

What is the measure of angle a and angle c ?