Idon’t understand this . can someone if you get it .

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

Ten times the square of a non-zero number is eqaul to ninety times the number

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.