8a : No because only the boys have a say and girls are part of the school to
8b: The question is random because it just asks it would be biased if it said what is your favorite sport fun basketball of boring soccer because it uses adjectives.
The theorem is that for a line bisecting two parallel lines, the oposite angles are equal. Hence, you can formulate the equation 4x+18 = 7x-21, which solves to 13.
