In triangle ABC, what is the measure of C if a = 20, b = 15, and c = 19? Round the answer to the nearest hundredth.

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.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?