After being rearranged in simplified which of the following equations could be solved using the quadratic formula

Solve the triangle. a = 21°, c = 105°, c = 5

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.

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test