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zhuklara [117]
3 years ago
8

A

Mathematics
1 answer:
vredina [299]3 years ago
7 0

Answer:

d is the answer young man

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An equation of an ellipse is given. x2 16 + y2 25 = 1 (a) Find the vertices, foci, and eccentricity of the ellipse. vertex (x, y
eimsori [14]

Answer:

(a)

  • The vertices are at (0,-5) and (0,5).
  • The coordinates of the foci are (0,-3) and (0,3).
  • Eccentricity=3/5

(b)Length of the major axis=10

Step-by-step explanation:

When the major axis of an ellipse is parallel to the y-axis.The standard form of the equation of an ellipse is given as:

\dfrac{x^2}{b^2}+\dfrac{y^2}{a^2}=1

Given the equation:

\dfrac{x^2}{16}+\dfrac{y^2}{25}=1

(I)The coordinates of the vertices are (0, \pm a)

a^2=25\\a^2=5^2\\a=5

Therefore, the vertices are at (0,-5) and (0,5).

(II)The coordinates of the foci are (0, \pm c)$ where c^2=a^2-b^2

c^2=a^2-b^2\\c^2=25-16\\c^2=9\\c=3

The coordinates of the foci are (0,-3) and (0,3).

(III)Eccentricity

This is the ratio of the distance c between the center of the ellipse and each focus to the length of the semi major axis.

Simply put, Eccentricity =c/a

Eccentricity=3/5

(b)Length of the major axis

The length of the major axis=2a

=2(5)=10.

4 0
3 years ago
Please helppp , 20 points for this question
Oksanka [162]
I believe the answer would be d
6 0
3 years ago
Find the lengths of the segments with variable expressions
nlexa [21]

Answer:

EF = 7 units

AD =  3 units

BC =  11 units

Step-by-step explanation:

Since it is an isosceles trapezoid and the midsegment is x, the sum of the bases divided by 1/2 is the value of the midsegment, x.

x = 1/2(x-4 + 2x-3)

x = 1/2x - 2 + x - 1 1/2

x = 1 1/2 x - 3.5

-1/2 x = -3.5

x = 7 units

EF = 7 units

AD = 7-4 = 3 units

BC = 2(7) - 3 = 11 units

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What is the perimeter of rectangle JKUM?<br> 32 units<br> 44 units<br> 56 units
yKpoI14uk [10]

Answer:

64

Step-by-step explanation:

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Answer:

14

-2

Step-by-step explanation:

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