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andrew11 [14]
4 years ago
13

Find the standard form of the equation of the ellipse with the given characteristics and center at the origin.

Mathematics
1 answer:
Rufina [12.5K]4 years ago
3 0

Answer:

The equation of the ellipse is \frac{x^{2}}{9} + \frac{y^{2}}{5} = 1

Step-by-step explanation:

Let the equation of the ellipse is \frac{x^{2}}{a^{2}} +  \frac{y^{2}}{b^{2}} = 1 {As the center of the ellipse is at the origin}

Therefore, the vertices of the ellipse are (± a,0) and foci are (± ae,0)

Now, given that a = 3 and ae = 2

Now, eccentricity of a ellipse is given by b² = a² - a²e² = 3² - 2² = 5

Therefore, the equation of the ellipse is \frac{x^{2}}{9} + \frac{y^{2}}{5} = 1 (Answer)

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dimaraw [331]
A vertical line is represented by x = a number
so ur vertical line is : x = 4 <==

** and just so u know, a horizontal line is represented by y = a number.
4 0
3 years ago
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Consider a game in which players draw playing cards one at a time from a standard 52-card deck. If a player draws a face card (a
aev [14]

Answer:

Expected value of drawing a card in this game on the first turn = 6

Step-by-step explanation:

Given - Consider a game in which players draw playing cards one at a time from a standard 52-card deck. If a player draws a face card (a jack, a queen, or a king), the player is awarded 16 points. Any other card drawn earns the player 3 points.

To find -  What is the expected value of drawing a card in this game on the first turn?

Formula used -

Expected value, E[x] = ∑ x p(x)

where p(x) is the probability

Proof -

Total cards in a standard deck = 52

Total face cards = 12 (a jack, a queen, or a king)

Other cards = 40

Now,

Probability of getting a face card = \frac{12}{52}

Probability of getting a other card = \frac{40}{52}

So,

Expected value, E[x] = ∑ x p(x)

                                  = (16)(\frac{12}{52}) + (3)(\frac{40}{52})

                                  = \frac{192}{52} + \frac{120}{52}

                                  = \frac{312}{52}

                                  = 6

∴ we get

Expected value of drawing a card in this game on the first turn = 6

So,

The correct option is - B. 6 points

4 0
3 years ago
This is the last thing i need..
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Which expression is equivalent to 144^3/2
Tju [1.3M]

Answer:

\large\boxed{144^\frac{3}{2}=1728}

Step-by-step explanation:

\sqrt[n]{a^m}=a^\frac{m}{n}\\\\144^\frac{3}{2}=144^{1\frac{1}{2}}=144^{1+\frac{1}{2}}\qquad\text{use}\ a^na^m=a^{n+m}\\\\=144^1\cdot144^{\frac{1}{2}}=144\sqrt{144}=144\cdot12=1728

6 0
3 years ago
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