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nikdorinn [45]
3 years ago
13

PLEASE HELP 30 PTS Select the correct answer.

Mathematics
2 answers:
wariber [46]3 years ago
4 0

Answer:

A

Step-by-step explanation:

Alina [70]3 years ago
4 0

Answer:

Nonlinear negative association aka D.

Step-by-step explanation:

Had this test.

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Find the area of the figure.
Viktor [21]

Answer:

91

Step-by-step explanation:

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4 years ago
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Anyone know the answer to all of these
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13:
A- The scale factor is 16 (80/5)

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A- The scale factor is 6 (30/5)
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Hope this helped you out tons! :D
3 0
3 years ago
Consider xưy" – 14xy' + 56y = 0. Find all values of r such that y=x" satisfies the differential equation for x > 0. Enter as
beks73 [17]

I bet the ODE is supposed to read

x^2y''-14xy'+56y=0

Then if y=x^r, we have y'=rx^{r-1} and y''=r(r-1)x^{r-2}, and substituting these into the ODE gives

r(r-1)x^r-14rx^r+56x^r=0\implies r(r-1)-14r+56=r^2-15r+56=0

Solving for <em>r</em>, we find

r^2-15r+56=(r-8)(r-7)=0\implies \boxed{r=8\text{ or }r=7}

so that y_1=x^8 and y_2=x^7 are two fundamental solutions to the ODE. Thus the general solution is

\boxed{y(x)=C_1x^8+C_2x^7}

Given that y(1)=4 and y'(1)=3, we get

\begin{cases}4=C_1+C_2\\3=8C_1+7C_2\end{cases}\implies C_1=-25\text{ and }C_2=29

So the particular solution is

\boxed{y(x)=29x^7-25x^8}

4 0
4 years ago
Which of the following is equivalnt to √20
Elodia [21]
2✓5.
In decimal form, it's 4.5.
6 0
4 years ago
What is the answer to n+ 9 =9
Eva8 [605]
N=0 hope this helpssss
3 0
3 years ago
Read 2 more answers
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