What is the value of x in the equation

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.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

How are sas and sss used to show that two triangles are congruent?