Let
W--------> the width of a rectangular pool
L--------> the length of a rectangular pool
P-------> Perimeter of the rectangular pool
we know that
Perimeter of the rectangular pool is equal to
[tex] P=2W+2L [/tex]
[tex] 2W+2L \geq 62 [/tex]
simplify
[tex] W+L \geq 31 [/tex] -------> inequality [tex] 1 [/tex]
[tex] W \geq (L-10) [/tex] -------> inequality [tex] 2 [/tex]
using a graph tool
see the attached figure
the solution of the system is the shaded area (Negative lengths are not being considered in the shaded area)
therefore
the answer is
The system of inequalities that represents the possible lengths and the possible widths of the pool is
[tex] W+L \geq 31 [/tex]
[tex] W \geq (L-10) [/tex]