Joe runs 8.75 times around a track in 1,125.803 seconds. if one lap around the track is 420.3 meters, which is the best estimate of the runner's average speed in meters per second (m/s)?

I’m stuck on this i don’t understand.

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.