Solving systems of Linear Equalities

Question

Vance wants to fence in a rectangular area for his dog. He wants the length of the rectangle to be at least 30 feet and the perimeter to be no more than 150 feet.

Answer 1

2*L + 2*w <= 150

L + w <= 75

L>=30

so

30 <= L

THen

30 + w <= L + w <= 75

That mean

30 +w <= 75

w <= 45

the width can be no more than 45