Help me with 3 of the maths please anyone ​

Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?

What is the slope of the equation y =

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*