Find all positive integers $n$ such that $n$, $n + 2$, and $n + 4$ are all prime.

Determine the quotient and remainder when (6a3)+11a2-4a-9) is divided by (3a-2) express your answer in the form q(a) + r(a)/d(a)

State if the two triangles are congruent. if they are, state how you know?

: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?