Atrain traveling at a constant rate of speed covers 340 miles and 5 hours which ratio can be used to find x the miles the train will travel in 8 hours

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

What does x = in this equation x+3+2x=x+5

[15 points, algebra 2]simplify the complex fraction and find the restrictions.