I know the answer but I am not sure how to get the answer :’) Can someone please help me? Thank you

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.

Acircle has a circumference of 28.36 units what is the diameter of the circle

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers