thank you very much

12. If 7" = 45 and 3' =81, what is the sum of x and y? (Give your answer to one significant figure). A. 4 B. 5 C. 6 D. 7 13. A company has a fixed cost of RM24,000 per month and a production cost of RM5 for each unit of product it manufactures. If the selling price of a unit is RM1 1, how many units does the company need to manufacture and sell to break even? A. 3000 B. 3500 C. 4000 D. 4500 14. Which of the following is the graph of y =6-x? X B D X