What is the solution to f(x)=g(x) ?

Which of the following of the following sets of side lengths could not form a triangle?

Two lines that do not intersect are skew. always sometimes or never

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