Write an equation and solve:

1. a stock inventory of an item was 65 on monday morning. at the close of business on friday, the inventory was level 18. how many were sold during the week?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

(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.

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?