I need help with this ASAP

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

How do i find the missing angle measure in a polygon

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x