Two sides of the rectangle are "a" and two sides of the rectangle are "a-5" add all four sides and you get a+a+a-5+a-5 Combine the like terms and you get 4a - 10.
The area is when you multiple the two sides together
<span>This is the term used to describe economic systems in which the basic economic questions are answered based on a socially, pre-established way.</span>
