What is (f . g) (x)?

Use the quadratic formula to solve 5x=6x^2-3,what are the values of x?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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.