A can do ajob in 16 days and B can do same job in 12 days. With the help of C they did the job in 4 days only. Then, C alone can do the job in..

48 days

Step-by-step explanation:

We know that,

Number of days A requires to do piece of work =16 days

Number of days B requires to do piece of work =12 days

Let us consider number of days C requires to do piece of work =x days

Number of days A,B and C together requires to do the piece of work =6 days

∴ We can calculate, work done by A in 1 day =1/16

Work done by B in 1 day =1/12

Work done by C in 1 day =1/x

Work done by A,B and C together in a 1 day =1/6

Now, work done by A,B and C together in 1 day is also equal to the sum of work done by each of them in 1 day =1/16+1/12+1/x=7/48+1/x

Therefore,

7/48+1/x=1/6

(7x+48)/48x=1/6

42x+288=48x

6x=288

x=288/6=48

∴C can do the work in 48 days.

i really dont know

step-by-step explanation:

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.