Sally can paint a room in in 7 hours while it takes Steve 9 hours to paint the same room. How long would it take them to paint the room if the worked together?

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?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers