The tens digit of a two digit number excedds the unit digit by 5 . if they are reversed b the new number is less by 45. if the v sum of their digits is 9 find the numbers

(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.