The graph of a function h is shown below.
Find h(1) and find one value of x for which h(x)=-3.

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

How to solve a simultaneous equation involved with fractions?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie