If one puppy is chosen at random, what is the probability that the puppy chosen is the black puppy?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.