Can someone please tell me what I have to do with n because it's the first time I do the sigma problem and the teacher didn't want to tell us what does n mean and we have to solve the equation

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

Runner ran 1 4/5 miles on monday and 6 3/10 on tuesday. how many times her monday’s distance was her tuesdays distance