Michelle purchased a kids table with a square top if the area of the square top is 400 square inches what is the length of one of the sides

The area of a square shape is the square of its length. The length of the square top is 20 inches

Given that:

The area of a square is:

Take square roots of both sides

So, we have:

Take positive square roots

Hence, the length of the square top is 20in (see attachment)

Read more about areas of squares at:

link

x/3-10=8

x/3=18

x=48