--4-12x-4
2х
?
2х
3х
+1
What is the missing term

Question and answers are in the attached picture. you so much in advance.

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

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12