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Elan Coil [88]
3 years ago
15

a rug in the shape of a regular quadrilateral has side length of 20ft. what is the perimeter of the rug?

Mathematics
2 answers:
Gre4nikov [31]3 years ago
7 0

Answer:

A rug in the shape of a regular quadrilateral has a side length of 20 . What is the perimeter of the rug?

A.4

B.5

C.40

D.80

Step-by-step explanation:


Helen [10]3 years ago
4 0
A rug in the shape of a regular quadrilateral has a side length of 20ft what is the perimeter of the rug? 4ft 5ft•• 40ft 80ft Correct me if I'm wrong!!

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Critical points occur where the gradient is zero. This is guaranteed whenever x=0 and either y=0 or y=-2.

The Hessian matrix for this function looks like

H(x,y)=\begin{bmatrix}f_{xx}&f_{xy}\\f_{yx}&f_{yy}\end{bmatrix}=\begin{bmatrix}-18e^y&-18xe^y\\-18xe^y&9e^y(2-x^2+4y+y^2)\end{bmatrix}

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At (0,0), you have a saddle point since the determinant reduces to -324, so (0,0,0) is the saddle point.

At (0,-2), the determinant is \dfrac{324}{e^4}>0 and f_{xx}(0,-2)=-\dfrac{18}{e^2}, so \left(0,-2,\dfrac{36}{e^2}\right) is a local maximum.

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