3 years ago

1+1 hows your day been, don’t forget to take a break from school guys and chill, put on some music and have a drink!!!!!!!

1 answer:

8 0

Answer: my day has been alright I have a lot of work and nobody is answering them or helping so I feel a bit frustrated and stressed... but thank you for caring <3

Step-by-step explanation:

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Solve the initial value problem yy′+x=x2+y2‾‾‾‾‾‾‾√ with y(1)=8‾√. To solve this, we should use the substitution u= x^2+y^2 help

leva [86]

Looks like the equation is

$yy'+x=\sqrt{x^2+y^2}$

Substitute $u(x)=x^2+y(x)^2$ , so that $u'=2x+2yy'$ . Then the equation is the same as

$\dfrac{u'-2x}2+x=\sqrt u\implies u'=2\sqrt u\implies\dfrac{\mathrm du}{2\sqrt u}=\mathrm dx$

Integrate both sides to get

$\sqrt u=C\implies\sqrt{x^2+y^2}=C$

Given that $y(1)=\sqrt8$ , we have

$\sqrt{1^2+(\sqrt8)^2}=C\implies C=3$

so the solution is

$\sqrt{x^2+y^2}=3$

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3 years ago

4,12,16,48,52,156,160,_,_,_ find the next 3 numbers

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Answer:

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3 years ago

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I need help with number 18

algol13

Answer:

61.6666666667 =61.67

Step-by-step explanation:

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Terry has 15 candles. She needs at least 100 candles. The candles she wants are sold in boxes of 8. What is the least number of

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Answer:

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Step-by-step explanation:

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Answer:

D

Step-by-step explanation:

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