Kurt is sailing due north at 9 mph. A wind blowing due west blows him off course. If the resultant velocity of his sailboat is 15 mph, what is the wind speed?

(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.