A car travels 143km in 2hours 45minutes .Find its speed in km / hour

52 km/hr

Step-by-step explanation:

Speed equals distance over time.

2 hours 45 minutes = 2.75 hours

S = 143/2.75

S = 52

The car’s speed is 52 kilometers per hour.

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.

its 50 miles away from the starting point