Would the answer to this problem be 27a^9 or 27a^6 and why?

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?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Which expression is equivalent to -12(3x-3/4)