a recipe uses x cups of flour and y cups of sugar. a baker makes n batches of the recipe. to help determine what ingredients he needs, the baker writes the expression nx + ny. what does ny represent?

(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.