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3 years ago

PLEASE HELP ME!!!! ill mark 1st persons answer as brainliest

Mathematics

1 answer:

kari74 [83]3 years ago

7 0

$(x+2y)( x-5y) = \\ \\ x^2-5xy+2yx-10y^2= \boxed{x^2-3xy-10y^2} \to Step \ 4$

I wish you much success in your studies!!!!

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Three plus the reciprocal of a number equals 7 divided by that number. What is the number?

tester [92]

3+1/x *x = 7/x*x
3x+1 = 7
3x+1-1=7-1
3x=6
3x/3 =6/3
x =2

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3 years ago

Can anybody answer this?

kirza4 [7]

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3 years ago

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3 years ago

Solving separable differential equation DY over DX equals xy+3x-y-3/xy-2x+4y-8

Ivanshal [37]

It looks like the differential equation is

$\dfrac{dy}{dx} = \dfrac{xy + 3x - y - 3}{xy - 2x + 4y - 8}$

Factorize the right side by grouping.

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Now we can separate variables as

$\dfrac{dy}{dx} = \dfrac{(x-1)(y+3)}{(x+4)(y-2)} \implies \dfrac{y-2}{y+3} \, dy = \dfrac{x-1}{x+4} \, dx$

Integrate both sides.

$\displaystyle \int \frac{y-2}{y+3} \, dy = \int \frac{x-1}{x+4} \, dx$

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$\implies \boxed{y - 5 \ln|y + 3| = x - 5 \ln|x + 4| + C}$

You could go on to solve for $y$ explicitly as a function of $x$ , but that involves a special function called the "product logarithm" or "Lambert W" function, which is probably beyond your scope.

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2 years ago

What is the coefficient of 4(3)(2)Q

inysia [295]

Answer:

Step-by-step explanation:

4 x 3 = 12

12 x 2= 24

Coefficient is the number infront of the varible being multiplied. In this case 24 is the coefficient, and Q is the variable.

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3 years ago