Solve the equation for a, when b=4 and c=5

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 g(x) is an odd function, which function must be an even function?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?