Hi! please help this question is worth 57 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.

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)