Ok, l = lewa's backpack and a= alai's. :)
1/2a -5 = l.
so to solve,
1/2 (36) - 5 = l.
18 - 5 = l.
13 = l.
so Lewa's backpack weighs 13 pounds. Hope it helps!

If I understood correctly and didn't make any mistakes...
Shorter side: 130ft
longer side: 260ft
greatest possible area: 33800ft^2
basically get the equations for area and perimeter which will be
A: lw (length x width)
P: l + 2w
Substitute them into eachother and you get the equation:
-2w^2+520w = A
find the vertex of this parabola which will give you the greatest width which is 130m
Then u can find length and area from this width
Answer:
The distance is 8 units because if you start at (-5,2) you will have to go up 8 units to get to (-5,10)
Step-by-step explanation: