PLEASE HELP 20 POINTS

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.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Wrote and expression for the difference of p and 4