Two functions are defined as shown f(x)=-1/2x-2. G(x)=-1 which graph shows the input value for which f(x)=g(x)

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 is best way to getting answer for my exam is

What expression is equivalent to (84+16)