Answer:
-8
Step-by-step explanation:
if you sub in 8 as the value for y, you get
-4x - 8 = 24
add 8 on both sides to simplify
-4x = 32
divide both sides by -4
x = -8
Answer:
12222
Step-by-step explanation:
Hello,
For a given perimeter (P) there are an infinity of Area (A)
Let's say x the length, and y the wide of the rectangle
P=2(x+y)
A=xy
k=x-y >=0
As (x+y)²-4xy=(x-y)²: A²-4P=k² or P=(A²-k²)/4
In primus, you will find a graph (abacus) giving P for a A and k given.
Negative Area or P are excluded.(just remind the first quadrant, A>=0 and P>=0)