What is the correlation coefficient of -0.0532^2+10.3169+394.421=404.73506

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 equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?