Why are you allowed to move the decimal points before dividing with decimals?

(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.

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Which of the following represents a function? 50 !