What is the sum of two solutions of the quadratic equation ax^2+bx+c=0

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?

Can you decompose the numbers 20,740,6,000

Standard deviation of 19,29,21,22,23