Sketch the algebra tile shape shown at right on your paper. Then:  

• Write an expression for the area of the shape.

• Write and simplify an expression for the perimeter of the shape.

• Calculate the area and perimeter of the shape for each value of $x$.

1. $x=7$ 

   Hint (a):

   Replace $x$ with $7$ in both expressions.

   More Help (a):

   $\text{Area}=7^2+7$
   $\text{Perimeter}=6(7)$

   Answer (a):

   $\text{Area}=56$ sq. un.
   $\text{Perimeter}=42$ un.

2. $x=2.5$ 

   Hint (b):

   See part (a).

3. $x=15$ 

   Hint (c):

   See part (a).