Someone please 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.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9