PLZ HELP ME

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

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.