Give an equation of the form f(x)=Acos(Bx−C)+D which could be used to represent the given graph. (Note: C or D may be zero.) Exam Image a) f(x)=6cos(2x−π2)+1 b) f(x)=6cos(2x−π2)−1 c) f(x)=3cos(2x−π2)+1 d) f(x)=3cos(2x−π2) e) f(x)=3cos(2x−π2)−1 f) None of the above.

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

How does reflecting or rotating a figure change the interior angles of the figure?