The perimeter of a rectangle is 15x+17y if the length is 7/2 +7y then find the width of the triangle

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.

Standard deviation of 19,29,21,22,23

Write the expression as a single natural logarithm. 2 in a - 4 in y