ANSWER
P(x)=2(f+g)(x)
EXPLANATION
The perimeter of a rectangle is calculated using the formula:
P=2(l+w)
From the table
The length is f(x)=x+3
The width is g(x)=x+2
This implies that the perimeter is
P(x)=2(f(x)+g(x))
This is the same as
P(x)=2(f+g)(x)
