Help me please
I really need help

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.

Triangle xyz has vertices x(1,3), y(0,0)

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5