CPM Homework Help : PC Problem 9-130

You have $110$ meters of fence to enclose and partition the rectangular area against a wall as shown in this top view.

Label all sides of the diagram.
Answer (a):
Express the area in terms of $x$ .
Answer (b):
$4x + y = 110$
$y = 110 −4x$
area $= xy$
area $= x\left(110 − 4x\right)$
Graph the area function and use the TRACE button on your calculator to determine the maximum area.
Graph (c):

Rectangle, top side is longer rectangle representing a wall, right side labeled, x, with 2 vertical segments, partitioning the interior rectangle, into 3 unequal parts.