A triangle has side lengths of (2t+2) centimeters,(6t-7) centimeters, and (u-2) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?

(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.