F(x) = V5x+7. g(x) = V5x - 7 Find (f + g)(x)
v is square root.

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.