Sidney is selling his comic book collection on the internet. The scatter plot shows how many comic book he has left at the end of each day.

Which of the following represents the length of a diagonal of this trapezoid?

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.

Which expression is the factorization of x^2+10+21