How do you use in decimal instead off lines one and twelve hundreths

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?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x