You have been evaluating functions – substituting a number or expression in for a given
variable [such as substituting a (-4) in for x in g(x)]. In other times in math and in life, we use
formulas, such as when we want to find the perimeter of a square. We simply multiply the
length of any one side by 4: P =4s. How are these two types of math problems related? Write
two to four thorough sentences explaining the connection.

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