Bunuel wrote:
The figure above represents an L-shaped garden. What is the value of k?
(1) The area of the garden is 189 square feet.
(2) The perimeter of the garden is 60 feet.
Kudos for a correct solution.
[Reveal] Spoiler:
Statement 1. Area=15k+(15-k)k=189 Hence 30k-(k^2)=189 ==> (-k^2)+30k-189=0 D=b^2 - 4ac= 900 - 4(-1)(-189)=144 Hence k=(-30 +12)/(-2)=9 or k= (-30-12)(-2)=21 But k<15 hence k=9 Sufficient
Statement
...