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vivado [14]
3 years ago
8

A rectangular field is 348 inches long and 7 yards wide. What is the perimeter of the field in feet? plz help me​

Mathematics
1 answer:
Lapatulllka [165]3 years ago
5 0

Answer:50 feet

Step-by-step explanation:

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Can anyone help me with question number 3
ira [324]
The answer is: There are 595 calories in a banana split 

To find this we first need to set up our equation: 

80= \frac{1}{7}x-5, where x= calories in a banana split


85= \frac{1}{7}x----------------Add 5 to both sides

595=x-------------------Multiply 7 to both sides to get rid of the fraction

So, there are 595 calories in a banana split

Hope this helps! :)
7 0
3 years ago
There were 160 smarties in the box yesterday, but now there are 116, what is the percent of change?
STALIN [3.7K]

Answer:

percent change = 27.5 % decrease

Step-by-step explanation:

percent change = (original - new)/original

percent change = (160-116)/160

percent change = 44/160

percent change =.275

change from a decimal

percent change = 27.5 % decrease


6 0
3 years ago
Find the critical points of the surface f(x, y) = x3 - 6xy + y3 and determine their nature.​
Vedmedyk [2.9K]

Compute the gradient of f.

\nabla f(x,y) = \left\langle 3x^2 - 6y, -6x + 3y^2\right\rangle

Set this equal to the zero vector and solve for the critical points.

3x^2-6y = 0 \implies x^2 = 2y

-6x+3y^2=0 \implies y^2 = 2x \implies y = \pm\sqrt{2x}

\implies x^2 = \pm2\sqrt{2x}

\implies x^4 = 8x

\implies x^4 - 8x = 0

\implies x (x-2) (x^2 + 2x + 4) = 0

\implies x = 0 \text{ or } x-2 = 0 \text{ or } x^2 + 2x + 4 = 0

\implies x = 0 \text{ or } x = 2 \text{ or } (x+1)^2 + 3 = 0

The last case has no real solution, so we can ignore it.

Now,

x=0 \implies 0^2 = 2y \implies y=0

x=2 \implies 2^2 = 2y \implies y=2

so we have two critical points (0, 0) and (2, 2).

Compute the Hessian matrix (i.e. Jacobian of the gradient).

H(x,y) = \begin{bmatrix} 6x & -6 \\ -6 & 6y \end{bmatrix}

Check the sign of the determinant of the Hessian at each of the critical points.

\det H(0,0) = \begin{vmatrix} 0 & -6 \\ -6 & 0 \end{vmatrix} = -36 < 0

which indicates a saddle point at (0, 0);

\det H(2,2) = \begin{vmatrix} 12 & -6 \\ -6 & 12 \end{vmatrix} = 108 > 0

We also have f_{xx}(2,2) = 12 > 0, which together indicate a local minimum at (2, 2).

3 0
2 years ago
Select the correct answer
NemiM [27]

let f(r)=sin^3r/cos^3r

so f(-r)= (sin(-r)/cos(-r))^3

=(-sinr/cosr)^3

=-f(r)

so it is odd function

4 0
3 years ago
Can you please help me solve this problem!! I need help!!! <br><br> (Zoom in the pic to see better)
Oksi-84 [34.3K]

Use same-length line segments to solve for x and y.

... PS = SR

... 4x +4 = 7x -17

... 21 = 3x . . . . . . . . . add 17-4x

... 7 = x . . . . . . . . . . . divide by 3

... PS = SR = 4·7+4 = 32

... PQ = QR

... 5y -31 = 2y +5

... 3y = 36 . . . . . . . . . add 31-2y

... y = 12 . . . . . . . . . . . divide by 3

... PQ = QR = 2·12 +5 = 29

... PT = TR = 6·7-2·12 = 18

7 0
3 years ago
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