What is the vertical height h of the tetrahedron

One positive number is 9 more than twice another. if their product is 95, find the numbers

(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.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x