If the sides of a square are lengthened by 3 m, the area becomes 81 m2. find the length of a side of the original square.

The length of a side of the original square is 6 meters

Step-by-step explanation:

Let

x ----> the length side of the original square

The area of a square is equal to

where

b is the length side of the square

In this problem

The new length side of the square is and the area is

so

solve for x

take square root both sides

histogram or dot plot?

step-by-step explanation:

cut 138 centimeters off

step-by-step explanation:

250-112 = 138