Atank has 450 gallons of water. a pump is draining the tank at a rate of 50 gallons every minute. represent the amount of water in the tank as a function of the amount of time the tank has been draining.

(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.