What is the domain of the relation?
-4<=x<=4
-4 -4<=x<=6
-4

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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.