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TiliK225 [7]
3 years ago
6

Please help me on this

Mathematics
2 answers:
Alex17521 [72]3 years ago
6 0

Answer:

7/8

Step-by-step explanation:

Count the number of lines/dots on the line

The question mark is over the 7th line out of 8.

gogolik [260]3 years ago
3 0

7 / 8 the second Option

....................

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Sergeu [11.5K]
I am pretty sure it’s c because you go up 4 and over 3 to the right so that would be plus 3
5 0
3 years ago
Solve the given initial-value problem. the de is a bernoulli equation. x2 dy dx − 2xy = 4y4, y(1) = 1 2
mario62 [17]
x^2\dfrac{\mathrm dy}{\mathrm dx}-2xy=4y^4
x^2y^{-4}\dfrac{\mathrm dy}{\mathrm dx}-2xy^{-3}=4

Substitute z=y^{-3}, so that \dfrac{\mathrm dz}{\mathrm dx}=-3y^{-4}\dfrac{\mathrm dy}{\mathrm dx}. Then the ODE in terms of z(x) is


-\dfrac13x^2\dfrac{\mathrm dz}{\mathrm dx}-2xz=4
x^2\dfrac{\mathrm dz}{\mathrm dx}+6xz=-12
x^6\dfrac{\mathrm dz}{\mathrm dx}+6x^5z=-12x^4

\dfrac{\mathrm d}{\mathrm dx}\left[x^6z\right]=-12x^4
\implies x^6z=-\dfrac{12}5x^5+C
\implies z=-\dfrac{12}{5x}+\dfrac C{x^6}
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and you can attempt to solve for y explicitly from here if you wish.
In any case, given that y(1)=\dfrac12 (presumably that's what you meant to write), we'd get

\dfrac1{\left(\frac12\right)^3}=-\dfrac{12}{5\cdot1}+\dfrac C{1^6}
8=-\dfrac{12}5+C\implies C=\dfrac{52}5

giving a particular solution of

\dfrac1{y^3}=-\dfrac{12}{5x}+\dfrac{52}{5x^6}
4 0
3 years ago
the sum of the digits 2014 is 7. How many whole numbers between 100 and 999 have 9 as the sum of their digits?
s344n2d4d5 [400]

Answer:

45

Step-by-step explanation:

this should be correct :)

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225

234

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There are 7 in the 300's

306

315  

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9+8+7+6+5+4+3+2+1 = 45

3 0
3 years ago
What is 3x3 devided by 233
marusya05 [52]
9/233
The answer will be 0.0386
I did not round it
3 0
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C

How far is the boat from the shoreline? C. 686 ft.

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