Harry purchased 16 hinges for his kitchen project. the hinges were on sale for $3 off their regular price. the total cost of the hinges was $80. what was the regular price for each hinge?

(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.