For a trapezoid, the following formula relates the area a, the two bases a and b, and the height h. a=1/2h(a b) solve for b.
A)
1/2 hA - B
B)
1/2 hB - A
C)
2A - B/h
D)
2A/h - B

(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.