What is 4 to the power of 3?

Geometry answer picture question pls . reason and statements

(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.

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14