Find the greatest common factor of the following monomials 27m^2 3m^2

Which is an equation for the nth terms of the sequence 12,15,18,21

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.

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?