Can’t figure out the pattern

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

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?