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Chapter 13 Sample Exam: Geometry and Conic Sections - Prof. John Redden, Exams of Algebra

A sample exam on geometry and conic sections. It includes 10 questions covering topics such as finding midpoints, calculating distances, graphing conic sections, and solving nonlinear systems. Students are required to answer all questions and show their work.

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

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Chapter 13_ Sample Exam
Please answer all the questions and show work where appropriate.
1. Given two points
()
2,3 โˆ’โˆ’ and
(
)
4,1
โˆ’
:
a. Find the midpoint between them.
b. Calculate the distance between them.
2. Graph 96
2โˆ’+โˆ’= xxy . Label the vertex and any intercepts.
Graph the following conic sections and label all appropriate points:
3. 020104
22 =+โˆ’โˆ’+ yxyx
4. 035216160416 22 =+โˆ’++ yxyx
5. 02815450925 22 =โˆ’++โˆ’ xyxy
6. Find the equation of a circle, in standard form, with center
(
)
3,2 โˆ’
โˆ’
and radius 5
units.
7. Find the equation of the given 8. Find the equation of the given
the graph of the conic section: given the graph of the conic.
9. Find the x & y โ€“ intercepts of
(
)
(
)
1
4
1
100
322
=
+
โˆ’
โˆ’yx .
10. Solve the nonlinear system: โŽช
โŽญ
โŽช
โŽฌ
โŽซ
+=
=+
2
10
2
22
xy
yx
x
y
-3 -2 -1 0 1 2 3 4 5 6 7
-3
-2
-1
1
2
3
4
5
6
7
x
y
-7 -6 -5 -4 -3 -2 -1 0 1 2
-5
-4
-3
-2
-1
1
2
3
4
5
6
pf2

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Chapter 13 _ Sample Exam

Please answer all the questions and show work where appropriate.

1. Given two points ( โˆ’ 3 , โˆ’ 2 )and ( 1 , โˆ’ 4 ):

a. Find the midpoint between them. b. Calculate the distance between them.

  1. Graph y = โˆ’ x^2 + 6 x โˆ’ 9. Label the vertex and any intercepts.

Graph the following conic sections and label all appropriate points:

  1. x^2 + y^2 โˆ’ 4 x โˆ’ 10 y + 20 = 0
  2. 16 x^2 + 4 y^2 + 160 x โˆ’ 16 y + 352 = 0
  3. 25 y^2 โˆ’ 9 x^2 + 50 y + 54 x โˆ’ 281 = 0

6. Find the equation of a circle, in standard form, with center ( โˆ’ 2 , โˆ’ 3 )and radius 5

units.

  1. Find the equation of the given 8. Find the equation of the given the graph of the conic section: given the graph of the conic.

9. Find the x & y โ€“ intercepts of (^ )^ (^ )^1

x โˆ’ (^3 2) โˆ’ y +^2 =.

  1. Solve the nonlinear system: โŽชโŽญ

2

2 2 y x

x y

x

y

-3 -2 -1 0 1 2 3 4 5 6 7

1

2

3

4

5

6

7

x

y

-7 -6 -5 -4 -3 -2 -1 0 1 2

1

2

3

4

5

6

Chapter 13 _ Sample Exam Answers

  1. a. (-1, -3) 6. ( x + 2 )^2 +( y + 3 )^2 = 25

b. 2 5

  1. y-intercept: (0, -9) 7. 1 25

( x โˆ’ 3 )^2 + y โˆ’^2 =

x-intercept: (3, 0) vertex: (3, 0)

( x + 3 )^2 โˆ’ y โˆ’^2 =

  1. y -intercepts: None x -intercepts: ( 3 โˆ’ 5 5 , 0 ) and ( 3 + 5 5 , 0 )
    1. (1, 3) and (-1, 3)

x

y -2 0 2 4 6 8

-14-

-10-

-6-

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