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Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

(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.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83