AnswersPrecalculusEquations of Ellipses

Equations of Ellipses Answers

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1
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On which line will the foci be graphed?

A
= 0
B
= 5
C
y = 0
D
y = 5
2
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The foci are located at about .

A
(4.58, 0) and (-4.58, 0)
B
(5.46, 0) and (-5.46, 0)
C
(0, 4.58) and (0, -4.58)
D
(0, 5.46) and (0, -5.46)
3

An ellipse has vertices of (5, 0) and (–5, 0) and covertices of (0, 2) and (0, –2). Use the given information to answer the questions about the ellipse. | On which line will the foci be graphed? | The foci are located at about . | What type of lines will the directrices be? | The directrices are located at about .

A
both vertical
B
both horizontal
C
both slanted
D
one vertical and one horizontal
4

The directrices are located at about .

A
y = 5.46 and y = -5.46
B
x = 5.46 and x = -5.46
C
y = 5.46x and y = -5.46x
D
= 5.46 and y = 5.46

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Equations of Ellipses Answers — Precalculus