Does anybody know how to write a numeral down

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?

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m