Ill give brainliest to someone who answers first

Mathematics

1 answer:

Mars2501 [29]3 years ago

6 0

It is 28 pounds. This is because all of the others have a ratio of 4:1 while 28 and 5.5 have a ratio of 56:13.

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Simplify the expression 9(h - 1)

Svetach [21]

Answer:

9h - 9

Step-by-step explanation:

9(h - 1)

<em>distribute</em>

(9 * h) + (9 * - 1)

9h + (9 * - 1)

9h + -9

9h - 9

4 0

3 years ago

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What’s 2x+3+3x-7=4c+15

Alik [6]

good luck hope you pass

5 0

3 years ago

X dy/dx +2y =x^2logx by using Bernoulli's Equation

inna [77]

This ODE isn't of Bernoulli type, but it is linear, so we should be able to find an integrating factor to solve it.

$x\dfrac{\mathrm dy}{\mathrm dx}+2y=x^2\log x\implies\dfrac{\mathrm dy}{\mathrm dx}+\dfrac2xy=x\log x$

The integrating factor will be

$\mu(x)=\exp\left(\displaystyle\int\frac2x\,\mathrm dx\right)=x^2$

Multiplying both sides of the ODE by the IF gives

$x^2\dfrac{\mathrm dy}{\mathrm dx}+2xy=x^3\log x$
$\dfrac{\mathrm d}{\mathrm dx}[x^2y]=x^3\log x$
$x^2y=\displaystyle\int x^3\log x\,\mathrm dx$

Integrate the right hand side by parts to get

$x^2y=\dfrac14x^4\log x-\dfrac1{16}x^4+C$
$y=\dfrac14x^2\log x-\dfrac1{16}x^2+\dfrac C{x^2}$