Need help 19 ×21=XX =

the answer is 399

Step-by-step explanation:

19 times 10 is 190. 19 times 10 again is 190. Add 190 together and you get 380. then, you add the final 19 and you get 399.

a. -0.3 > -0.33

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.