Astudent wants to reduce the size of an article he found in a newspaper. the original article was 12 cm wide. he needs to reduce it so its width measures 9 cm. on the copier, what percent setting should he can use to make a copy this size? a. 75% b. 60% c. 50% d. 90%

(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.