Look at pic 10 pts will mark brainilest shsh

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.