For this you need the formula for a circle:
A=πr2 (pi r squared)
You know the diameter is 50 yards, so the radius will be half of the diameter.
A=π(25) squared
A=(3.14159)(25) squared
(remember to square before you multiply - order of operations)
A=(3.14159)(25*25)
A=(3.14159)(625)A=1963 yards
Hope this helps! :)
EXPLANATION
Given the expression 2y(x-y) +12=5x , plugging in x=3 into the expression,
2y(3-y) + 12 = 5*3
6y -2y^2 + 12 = 15
Rearranging terms:

Now, we need to apply the quadratic equation:




Multiplying terms:
![y_{1,2}=\frac{-6\pm\sqrt[]{36-24}}{-4}](https://tex.z-dn.net/?f=y_%7B1%2C2%7D%3D%5Cfrac%7B-6%5Cpm%5Csqrt%5B%5D%7B36-24%7D%7D%7B-4%7D)
Subtracting numbers:
![y_{1,2}=\frac{-6\pm\sqrt[]{12}}{-4}](https://tex.z-dn.net/?f=y_%7B1%2C2%7D%3D%5Cfrac%7B-6%5Cpm%5Csqrt%5B%5D%7B12%7D%7D%7B-4%7D)
Simplifying:

Answer:
48
Step-by-step explanation:
6+6+12 = 24
192/24 = 8
8*6 = 48
(Ratio is 48:48:96)
The first answer is 3, the second one is 1, & the third one is (-8,4)