Can someone me plz. my answer was 9 but it was wrong. plz solve for x 3x+9=27

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?

Consider a graph for the equation y= -3x+4. what is the y intercept? a) 4 b) -4 c) 3 d) -3

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.