Five years before, the age of father was 5 times of the age of son. Ten years hence, the age of
father will become 2.5 times of the age of son. At present, what is the ratio of the sum of their
ages and the difference of their ages?

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.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

-1   1/6.   you dont subtract the denominators

step-by-step explanation: