Question

An artist wants to frame a square painting with an area of 400 square inches. She wants to know what the length of the wood trim that is needed to go around the painting. If x is the length of one side of the painting, what equation can you set up to find the length of a side?

Answer 1

If she wants to frame a square painting with an area of 400 square inches, all you would have to do is to find the square root of 400, which is 20. Thus, each side is 20 inches long. 

If you have to set an equation up, it would simply be:

$x= \sqrt{400}$