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Y_Kistochka [10]
2 years ago
11

3. Calculer le volume d'un cylindre de rayon 4 cm et de hauteur 15 cm ( valeur exacte puis arrondie au centième

Mathematics
2 answers:
Irina18 [472]2 years ago
8 0

Answer:

188.50

Step-by-step explanation:

Aloiza [94]2 years ago
3 0

Answer:

4*15*pi

188.495559215

<h2>188.50 </h2>

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7 divided by 4 x + 3 Y + 4 divided / 4 x minus 3 Y is equal to 5 / 4
DerKrebs [107]

9514 1404 393

Answer:

  (x, y) = (4, 4)

Step-by-step explanation:

If you attempt to solve this by clearing fractions, you end up with an extraneous solution. Here, we'll solve the linear equations ...

  7a +4b = 5/4

  8b -14a = 3/2

where a = 1/(4x+3y) and b = 1/(4x-3y)

Dividing the second equation by 2 and adding the first, we have ...

  (7a +4b) +1/2(8b -14a) = (5/4) +1/2(3/2)

  8b = 8/4

  b = 1/4

Substituting into the first equation gives ...

  7a +4/4 = 5/4

  a = 1/28

__

Now, we can get back to solving for x and y.

  4x +3y = 1/a = 28

  4x -3y = 1/b = 4

  8x = 32 . . . . . . . . . add the two equations

  x = 4

  3y = 28 -4x = 28 -4(4) = 12 . . . . . use x in the equation for 'a'; rearrange

  y = 4 . . . . divide by 3

The solution to the system of equations is (x, y) = (4, 4).

_____

<em>Additional comment</em>

If you graph these equations, you find they describe hyperbolas that intersect at (0, 0) and (4, 4). The "solution" (0, 0) is extraneous, as both equations are undefined there.

7 0
2 years ago
celia donates 10.2 inches of her hair to a company that makes wings.danielle donates 2.4 fewer inches of her hair than celia.how
Mashcka [7]

mathematically the answer to that is 18 because 10.2 minus 2.4 is equal to the difference of 7.8 and 7.8 plus 10.2 is equal to the sum of exactly and positively 18

7 0
3 years ago
The chance of winning based on the type of lottery tickets we purchase is 0.05, or 1 in 20. We will play each saturday until we
BigorU [14]

Answer:

Given that the probability of winning is = 0.05

So the probability of losing is = 1 - 0.05 = 0.95.

We are told we have a 1 in 20 chance

Success: 0.05

Failure: 0.95

P(X=4)= 0.95*0.95*0.95*0.05

So the chance is 0.04286 or Option D

6 0
2 years ago
How many different combinations of “on” and “off” are possible with 8 “lightbulbs”?
viktelen [127]

How many different combinations of “on” and “off” are possible with 8 “light bulbs”?

Answer: The total number of combinations of "on" and "off" that are possible with 8 "light bulbs" is 2^{8}=256

Therefore, 256 different combinations of “on” and “off” are possible with 8 “light bulbs”

5 0
3 years ago
What fraction equals 15/21 with a denominator of 7
Darina [25.2K]

Answer:

5/49

Step-by-step explanation:

decimal form = 0.10

4 0
3 years ago
Read 2 more answers
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