Write an expression to describe the sequence below. Use n to represent the position of a term in the sequence, where n = 1 for the first term. –48, –96, –144, –192, ...

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.