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4 years ago

Pls solve will mark brainiest, five stars and will give a thanks

Mathematics

2 answers:

Goryan [66]4 years ago

8 0

Answer:

8 times

Step-by-step explanation:

3/4 n = 6

Multiply each side by 4/3 to isolate n

4/3 * 3/4 n = 6*4/3

n = 8

kakasveta [241]4 years ago

7 0

Answer:

the answer to your question is 8:)

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Consider the system of differential equations dx/dt=−2y dy/dt=−2x. . Convert this system to a second order differential equation

Musya8 [376]

Answer:

Step-by-step explanation:

we have the following differential equations

$\frac{dx}{dt}=-2y\\\frac{dy}{dt}=-2x\\$

by differentiating the second equation we have

$\frac{d}{dt}(\frac{dy}{dt})=-2\frac{dx}{dt}\\\frac{d^{2}y}{dt^{2}}=-2\frac{dx}{dt}\\\frac{dx}{dt}=\frac{-1}{2}\frac{d^{2}y}{dt^{2}}$

and we replace dx/dt in the first equation

$\frac{-1}{2}\frac{d^{2}y}{dt^{2}}=-2y\\\frac{d^{2}y}{dt^{2}}-4y=0$

and by using the characteristic polynomial

$m^{2}+4=0\\m=\±2i$

the solution is

$y(t)=Acos(2t)+Bsin(2t)$

and to compute x(t) we have

$\frac{dx}{dt}=-2Acos(2t)-2Bsin(2t)\\\\\int dx = \int[-2Acos(2t)-2Bsin(2t)]dt\\\\x(t)=-Asin(2t)+Bcos(2t)$

and if we use x(0)=4 and y(0)=3, we can calculate the constants A and B

$x(0)=B=4\\y(0)=A=3$

I hope this is useful for you

regards

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3 years ago

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Please Help! A new dirt bike valued at $9000 loses 18% of its value each year. What is the initial price of the dirt bike? I don

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Answer:

The new dirt bike should cost $9000

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3 years ago

What is -5.1982569 to the nearest hundredths

s2008m [1.1K]

- 5 . 1 9 8 2
|
hundredths place

so -5.2 or -5.20 for sig. fig.

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$slope = \frac{3 - 9}{ - 10 - 15} \\$

$slope = \frac{ - 6}{ - 25} \\$

$slope = \frac{6}{25} \\$

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3 years ago

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Compute: 33 * 32 * 31 * 30 * 3−1 * 3−2 =

mario62 [17]

Answer:

Hello there! I'm Ashlynn I'm always here to help!

___________________________________________

(33 * 32 * 31 * 30 * 3) - (1 * 3) - 2 = 2 946 235

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“Every day may not be good... but there’s something good in every day.”

-Alice Morse Earle

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Good Luck!

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