Please can someone help me

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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 solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2