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Annette [7]
3 years ago
5

Just questions 4, 5 and 6

Mathematics
1 answer:
aivan3 [116]3 years ago
6 0
4 is 90 
5 is 90
6 is 90 
that's what my friends said I hope he's correct  
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Lillie read an average of 5 books per month in the first nine months of the year. In the last three months of the year, she read
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5 x 9 = 45
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Write 17,924 in expanded form
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Solve the given differential equation by undetermined coefficients. y'' 4y = 7 sin(2x)
kherson [118]

The solution to the given differential equation is yp=−14xcos(2x)

The characteristic equation for this differential equation is:

P(s)=s2+4

The roots of the characteristic equation are:

s=±2i

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yh=c1sin(2x)+c2cos(2x)

Notice that the forcing function has the same angular frequency as the homogeneous solution. In this case, we have resonance. The particular solution will have the form:

yp=Axsin(2x)+Bxcos(2x)

If you take the second derivative of the equation above for  yp , and then substitute that result,  y′′p , along with equation for  yp  above, into the left-hand side of the original differential equation, and then simultaneously solve for the values of A and B that make the left-hand side of the differential equation equal to the forcing function on the right-hand side,  sin(2x) , you will find:

A=0

B=−14

Therefore,

yp=−14xcos(2x)

For more information about differential equation, visit

brainly.com/question/18760518

8 0
2 years ago
What is 2x+18 factored
Darina [25.2K]

Answer:

2(x+9)

Step-by-step explanation:

2x+18

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so; 2(x+9)

7 0
2 years ago
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