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NikAS [45]
3 years ago
12

 if xy=c^2, prove that x^2 dx/dy+c^2=0

Mathematics
1 answer:
tatyana61 [14]3 years ago
7 0
Hello,

xy=c²==>y=c²/x
==>y'=dy/dx=-c²/x²==>x² dy/dx+c²=0 (there is a mistake)

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Daria sells televisions. She earns a fixed amount for each television and an additional $15 if the buyer gets an extended warran
Genrish500 [490]

Answer: $70

Step-by-step explanation:

11 x 15 = 165    -    this is the amount she gets for all 11 of the extended warranties

935 - 165 = 770    -   this is the amount she gets for all 11 of the televisions

770 / 11 = 70      -      this is the amount she gets for 1 television

6 0
3 years ago
11. Rocco and Biff are two koalas sitting at the
bagirrra123 [75]

Answer:

Biff's tree is 14 m off the ground and Rocco's tree is 7 m off the ground.

Step-by-step explanation:

Let the height of Biff's tree be represented by x, so that the height of Rocco's tree is \frac{x}{2}.

Draw a straight line from Rocco's point of view to a point t to the middle of Biff's tree. This line divides x into two equal parts, and the angle is divided into 35^{0} each.

By alternate angle property,

Tan  35^{0} = \frac{\frac{x}{2} }{10}

\frac{x}{2} = Tan  35^{0} × 10

  = 7.00021

⇒       x = 2 × 7.0021

            = 14. 0042

         x = 14

Therefore, Biff's tree is 14 m off the ground and Rocco's tree is 7 m off the ground.

5 0
3 years ago
Read 2 more answers
One side times the side different from the first one =area
insens350 [35]
Length × width=area
length+width + height
5 0
3 years ago
Justin is asked to solve the following system of linear equations using the elimination method.
romanna [79]

Alright, lets get started.

Justin is asked to solve the linear equations using elimination method.

By using elimination method means we have to multiply some numbers in our given equations in such a way that the co-efficient of x or y become same in both equations so that we could add or subtract them to cancel one of the term either x or y.

So, given equations are :

5x - 12 = 3

-20x + 14 y = 13

See we have 5x in first equation and -20x in second equation.

So, we try to change 5x into 20 x by multiplying it with 4, both of the equations will have 20 x in common

Lets multiply 4 in first equation

4 * (5x-12y) = 4 * 3

20x - 48y = 12

Now both equations could be added and 20 x will be cancelled out and we could easily find the value of y then solve for x.

So, Justin should try to change 5 so that it will be cancels, so option B  :  Answer

Hope it will help :)


3 0
3 years ago
0.2, 0.19,3/5 greatest to least
nasty-shy [4]
3/5=0.6

3/5, 0.2, 0.19
7 0
3 years ago
Read 2 more answers
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