31. The large science-fiction posters are on sale for of the regular price. What is the sale price of a post-
er that usually sells for $2.20?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

What is the value of x in the following equation. -x ^3/2 = -27

(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.