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xxTIMURxx [149]
3 years ago
9

Answer choices: A.) 441 B.) 64 C.) 22.5 D.) 19.4

Mathematics
2 answers:
kati45 [8]3 years ago
8 0
I’m pretty sure it’s d
Liono4ka [1.6K]3 years ago
6 0

im pretty sure it's 19.4

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Choose all of the following angles that cannot
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40 45 because the minimum internal angle is 60

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Robert has fish, chickens, and dogs. There are 28 eyes total and 16 legs total. Also, there are twice as many fish as chickens.
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Find the general solution of the nonhomogeneous differential equation x^2y''-2y=3(x^2) -1, (x>0).
Ira Lisetskai [31]

Answer:

G.S=C_1\frac{1}{x}+C_2x^2+x^2logx+\frac{1}{2}

Step-by-step explanation:

We are given that non-homogeneous differential equation

x^2y''-2y=3(x^2)-1

It is Cauchy Euler equation

Substitute x=e^t  x>0

Auxillary equation

D'(D'-1)-2=0

D'^2-D'-2=0

(D'-2)(D'+1)=0

D'-2=0 \implies D'=2

D'+1=0\implies D'=-1

Complementary solution

y=C_1e^{-t}+C_2e^{2t}

y=C_1\frac{1}{x}+C_2x^2

Particular solution

y_p=\frac{3e^{2t}}{D'^2-D'-2}-\frac{e^{0t}}{D'^2-D'-2}

y_p=te^{2t}+\frac{1}{2}=x^2logx+\frac{1}{2}

G.S=C_1\frac{1}{x}+C_2x^2+x^2logx+\frac{1}{2}

Hence, general solution G.S=C_1\frac{1}{x}+C_2x^2+x^2logx+\frac{1}{2}

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4 years ago
Notice that the rule for each animal involves counting the number of chirps in different time intervals. For the Brookdale crick
shusha [124]
B= 15c maybe I think
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3 years ago
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