Find the gcf of each pair of monominals 54gh,72g

If a(0,0,0) and b(2,2,2) are points in coordinate space, how many paths are there from a to b that move from one lattice point to another in the positive x-,y- or z- direction?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls