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adell [148]
3 years ago
5

WILL MARK BRAINLIEST RIGHT NOW!!

Mathematics
1 answer:
Simora [160]3 years ago
7 0

Answer:

#3. x=\sqrt{wy}\\

Explanation:

Pythagorean theorem: leg² + leg² = hypotenuse²

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CAN SOMEONE HELP ME ON 1-9 NOW PLEASE I WILL MARK YOU BRAINLY.
bazaltina [42]

Answer:

1. 0.75 cups or 3/4 cups

2. 0.75 cups or 3/4 cups

3. 10 quarts in 2 1/2 gallons

4. 3 3/4 or 3.75

5.  3/4 gallon

6.  2.5 sticks or 2 1/2 sticks

7. 1 3/5 pounds

8. 12 teaspoons

9.  12.5 or 25/2 I think

3 0
3 years ago
For the differential equation 3x^2y''+2xy'+x^2y=0 show that the point x = 0 is a regular singular point (either by using the lim
Svetlanka [38]
Given an ODE of the form

y''(x)+p(x)y'(x)+q(x)y(x)=f(x)

a regular singular point x=c is one such that p(x) or q(x) diverge as x\to c, but the limits of (x-c)p(x) and (x-c)^2q(x) as x\to c exist.

We have for x\neq0,

3x^2y''+2xy'+x^2y=0\implies y''+\dfrac2{3x}y'+\dfrac13y=0

and as x\to0, we have x\cdot\dfrac2{3x}\to\dfrac23 and x^2\cdot\dfrac13\to0, so indeed x=0 is a regular singular point.

We then look for a series solution about the regular singular point x=0 of the form

y=\displaystyle\sum_{n\ge0}a_nx^{n+k}

Substituting into the ODE gives

\displaystyle3x^2\sum_{n\ge0}a_n(n+k)(n+k-1)x^{n+k-2}+2x\sum_{n\ge0}a_n(n+k)x^{n+k-1}+x^2\sum_{n\ge0}a_nx^{n+k}=0

\displaystyle3\sum_{n\ge2}a_n(n+k)(n+k-1)x^{n+k}+3a_1k(k+1)x^{k+1}+3a_0k(k-1)x^k
\displaystyle+2\sum_{n\ge2}a_n(n+k)x^{n+k}+2a_1(k+1)x^{k+1}+2a_0kx^k
\displaystyle+\sum_{n\ge2}a_{n-2}x^{n+k}=0

From this we find the indicial equation to be

(3(k-1)+2)ka_0=0\implies k=0,\,k=\dfrac13

Taking k=\dfrac13, and in the x^{k+1} term above we find a_1=0. So we have

\begin{cases}a_0=1\\a_1=0\\\\a_n=-\dfrac{a_{n-2}}{n(3n+1)}&\text{for }n\ge2\end{cases}

Since a_1=0, all coefficients with an odd index will also vanish.

So the first three terms of the series expansion of this solution are

\displaystyle\sum_{n\ge0}a_nx^{n+1/3}=a_0x^{1/3}+a_2x^{7/3}+a_4x^{13/3}

with a_0=1, a_2=-\dfrac1{14}, and a_4=\dfrac1{728}.
6 0
4 years ago
3(-5x+3)=8x+9 how do i find x?
iVinArrow [24]

Answer:

No solution

Step-by-step explanation:

-15x+9=8x+9

-23x=0

No solution

6 0
3 years ago
Read 2 more answers
11. Sarah bought 4 pounds of peaches and
Keith_Richards [23]

Answer:

3

Step-by-step explanation:

4 - 1 = 3 Therefore, Sarah bought 3 more pounds of peaches then she did apples.

6 0
3 years ago
Find the constant of variation for the relationship f(x)= 50x.
djyliett [7]
<span>f(x)= 50x
</span><span>y = k x
k is variation
so k= 50
D is the right option
hope it helps
</span>
3 0
3 years ago
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