When a train ride is nonstop, the time of the ride is reduced by 1/3. with stops, the time is 18 hours. how long is the nonstop ride?

  Nonstop ride is 12 hours long.

Explanation:

 With stopping time taken by train = 18 hours.

 Without stopping time is reduced by 1/3.

 Time for non stop ride = Time for stopping ride -  (Time for stopping ride/3)

                                        = 2 x Time for stopping ride/3

                                        = 2 x 18 /3 = 12 hours.

 So, nonstop ride is 12 hours long.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.