Which expressions are equivalent to 4(4a+5)?
a) 16a+5
b) 16a+20
c)12a+20+4a
d)2(8a+10)
e)16a+5+4
choose three answers

(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.