z varies jointly as x and y and inversely as w. if z = 16 when x = 5, y= 4 and w =10, find z when x =6, y = 8, and w = 12.​

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The tile along the edge of a triangular community pool needs to be replaced? ?

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2