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natta225 [31]
3 years ago
7

Goldennnjoyyy avatar

Mathematics
2 answers:
maxonik [38]3 years ago
5 0

Answer:

<h3>1. Logan's Average speed is 2.25 kilometers per hour.</h3><h3>2. Mila's average swimming speed is 34.44 m/min.</h3><h3>3. His average speed was 3 times 750 meters per hour, which is 2250 meter per hour, or 750 OVER 20 = 37.5 meters per minute.</h3>

Step-by-step explanation:

<h3>i hope it helps :)</h3>
BartSMP [9]3 years ago
4 0

Answer:

  • See below

Step-by-step explanation:

<u>Speed = distance/time</u>

1. Logan swam 750 meters in 1/3 of an hour

<u>Logan's speed is:</u>

  • s = 750 : 1/3 = 750*3 = 2250 meters /hour

2.<u> Mila swam 2/3 of Logan's distance:</u>

  • 2/3*750 = 500 meters
  • Time is 1/4 of an hour

<u>Mila's speed is:</u>

  • s = 500 : 1/4 = 500 * 4 = 2000 meters/hour

3. <u>The difference is:</u>

Logan is faster by: 2250 - 2000 = 250 meters/hour

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Step-by-step explanation:

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Determine whether each of the following functions is a solution of laplace's equation uxx uyy = 0.
ratelena [41]

Both functions are the solution to the given Laplace solution.

Given Laplace's equation: u_{x x}+u_{y y}=0

  • We must determine whether a given function is the solution to a given Laplace equation.
  • If a function is a solution to a given Laplace's equation, it satisfies the solution.

(1) u=e^{-x} \cos y-e^{-y} \cos x

Differentiate with respect to x as follows:

u_x=-e^{-x} \cos y+e^{-y} \sin x\\u_{x x}=e^{-x} \cos y+e^{-y} \cos x

Differentiate with respect to y as follows:

u_{x x}=e^{-x} \cos y+e^{-y} \cos x\\u_{y y}=-e^{-x} \cos y-e^{-y} \cos x

Supplement the values in the given Laplace equation.

e^{-x} \cos y+e^{-y} \cos x-e^{-x} \cos y-e^{-y} \cos x=0

The given function in this case is the solution to the given Laplace equation.

(2) u=\sin x \cosh y+\cos x \sinh y

Differentiate with respect to x as follows:

u_x=\cos x \cosh y-\sin x \sinh y\\u_{x x}=-\sin x \cosh y-\cos x \sinh y

Differentiate with respect to y as follows:

u_y=\sin x \sinh y+\cos x \cosh y\\u_{y y}=\sin x \cosh y+\cos x \sinh y

Substitute the values to obtain:

-\sin x \cosh y-\cos x \sinh y+\sin x \cosh y+\cos x \sinh y=0
The given function in this case is the solution to the given Laplace equation.

Therefore, both functions are the solution to the given Laplace solution.

Know more about Laplace's equation here:

brainly.com/question/14040033

#SPJ4

The correct question is given below:
Determine whether each of the following functions is a solution of Laplace's equation uxx + uyy = 0. (Select all that apply.) u = e^(−x) cos(y) − e^(−y) cos(x) u = sin(x) cosh(y) + cos(x) sinh(y)

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liraira [26]

Answer:

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Step-by-step explanation:

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