20 points and brainliest to the best correct answer, question is in the photo

(hurry! ) which expression is equivalent to the following complex fraction?

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your