How many ways can you get 8 by adding using only 1-6

Polynomial that can be factored as (3x-4)(3x+4)

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Is the figure congruent? yes or no?