Simplify the expression 3^4 divided by 3^9

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

: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?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f