Answer:
don't ask for an explanation. your answer is below.
Step-by-step explanation:

Answer:
Length is 20 m and width is 4 m.
Step-by-step explanation:
Given:
Perimeter of the rectangular alley, 
Length is 5 times the width.
Let width be
.
So, as per question,
Length,
Now, perimeter of rectangle is given as:

Plug in 48 for
,
for
and
for b.

Therefore, width is 4 m.
Length is
m.
Yes it is correct. You plotted the slope and initial rate value correctly and found the
point of intersection.