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What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Indicate the formula for the following conditions: p^c(n,r)=

(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.