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IrinaK [193]
3 years ago
14

Please fast brainly giving brainlist to correct answer

Mathematics
1 answer:
deff fn [24]3 years ago
8 0

Answer:

1. 2/3

2. 15/2 (7.5)

Step-by-step explanation:

1. Scale down from larger to smaller:

6/9 = 4/6 = 2/3

ΔDEF ⇒  ΔABC  =\frac{2}{3}

2. EF=\frac{5}{\frac{2}{3} } =\frac{(5)(3)}{2} =15/2  or 7.5

I hope this help you

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(1+x^2)dy/dx+2xy-4x^2=0 bu using Bernoulli's Equation
erastovalidia [21]
Not of Bernoulli type, but still linear.

(1+x^2)\dfrac{\mathrm dy}{\mathrm dx}+2xy=4x^2

There's no need to find an integrating factor, since the left hand side already represents a derivative:

\dfrac{\mathrm d}{\mathrm dx}[(1+x^2)y]=(1+x^2)\dfrac{\mathrm dy}{\mathrm dx}+2xy

So, you have

\dfrac{\mathrm d}{\mathrm dx}[(1+x^2)y]=4x^2

and integrating both sides with respect to x yields

(1+x^2)y=\displaystyle\int4x^2\,\mathrm dx
(1+x^2)y=\dfrac43x^3+C
y=\dfrac{4x^3}{3(1+x^2)}+\dfrac C{1+x^2}
7 0
3 years ago
Which of the following numbers is between 0.40 and 0.47 ?
fredd [130]

The Answer is 21/50 which is = 0.42

6 0
3 years ago
Read 2 more answers
How does the method for solving equations with fractional or decimal coefficients and constants compare with the method for solv
I am Lyosha [343]

Answer:

Step-by-step explanation:

When solving equations with fractional or decimal coefficients, the equations needs to be multiplied by the multiple of denominator such that the equations have integer coefficients and constants

6 0
3 years ago
Four more than the quotient of a number and 3 is 9
barxatty [35]

The algebraic expression of "Four more than the quotient of a number and 3 is 9" is \frac{x}{3}+4=9

The value of x=15

Step-by-step explanation:

We need to express "Four more than the quotient of a number and 3 is 9" as algebraic expression.

Let the number = x

Solving:

quotient of a number and 3: \frac{x}{3}

Four more than the quotient of a number and 3: \frac{x}{3}+4

Four more than the quotient of a number and 3 is 9: \frac{x}{3}+4=9

Now, finding value of x:

\frac{x}{3}+4=9\\Adding\,\,-4\,\,on\,\,both\,\,sides:\\\frac{x}{3}+4-4=9-4\\\frac{x}{3}=5\\Multiply\,\,both\,\,sides\,\,by\,\,3:\\x=5*3\\x=15

So, value of x = 15

Keywords: Algebraic expression

Learn more about algebraic expression at:

  • brainly.com/question/1600376
  • brainly.com/question/1617787
  • brainly.com/question/9720317

#learnwithBrainly

4 0
3 years ago
What is the value of x in the equation 2x+3y=36 when y is 6​
Andrew [12]

2x + 3*6 = 36

2x = 36-18

2x = 18

x = 9

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3 years ago
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