A square has an area of 40 square meters. What is the perimeter of the square?

Because all the sides of a square are equal, its side length is the square root of 40, which can be simplified to 2 radical 10. Then you multiply by 4 to find the perimeter, which would be 8 radical 10.

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable