Can anyone help me with this?

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.

What are the sotions to the quadratic equation 9x^2=4

Find the nonpermissible replacement for binthis expression.b2/5b +5