Tickets to a fair cost 12 for each adult an 7 for each child write an expression to find the cost for 3 adults and 6 children

Find the value of the cosine for angle a

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

I’m which figure is point g an orthocenter