Nina has 25 tennis balls and hal has 30.

which equation can be used to calculate how many more tennis balls hal has than nina?

a.
x + 25 = 30

b.
x – 30 = 25

c.
25 – x = 30

d.
30 + 25 = x

(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.