The formula C = 2πr relates the radius r of a circle to its circumference C. Solve the formula for r. Drag and drop the numbers and variables into the correct boxes to complete the formula.

7x+8y=-18, 4x-9y=-3 solve the system of equations

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

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.