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College Algebra 2e

Practice Test

College Algebra 2ePractice Test

Practice Test

For the following exercises, write the equation in standard form and state the center, vertices, and foci.

1.

x 2 9 + y 2 4 =1 x 2 9 + y 2 4 =1

2.

9 y 2 +16 x 2 −36y+32x−92=0 9 y 2 +16 x 2 −36y+32x−92=0

For the following exercises, sketch the graph, identifying the center, vertices, and foci.

3.

( x−3 ) 2 64 + ( y−2 ) 2 36 =1 ( x−3 ) 2 64 + ( y−2 ) 2 36 =1

4.

2 x 2 + y 2 +8x−6y−7=0 2 x 2 + y 2 +8x−6y−7=0

5.

Write the standard form equation of an ellipse with a center at ( 1,2 ), ( 1,2 ), vertex at ( 7,2 ), ( 7,2 ), and focus at ( 4,2 ). ( 4,2 ).

6.

A whispering gallery is to be constructed with a length of 150 feet. If the foci are to be located 20 feet away from the wall, how high should the ceiling be?

For the following exercises, write the equation of the hyperbola in standard form, and give the center, vertices, foci, and asymptotes.

7.

x 2 49 − y 2 81 =1 x 2 49 − y 2 81 =1

8.

16 y 2 −9 x 2 +128y+112=0 16 y 2 −9 x 2 +128y+112=0

For the following exercises, graph the hyperbola, noting its center, vertices, and foci. State the equations of the asymptotes.

9.

( x−3 ) 2 25 − ( y+3 ) 2 1 =1 ( x−3 ) 2 25 − ( y+3 ) 2 1 =1

10.

y 2 − x 2 +4y−4x−18=0 y 2 − x 2 +4y−4x−18=0

11.

Write the standard form equation of a hyperbola with foci at ( 1,0 ) ( 1,0 ) and ( 1,6 ), ( 1,6 ), and a vertex at ( 1,2 ). ( 1,2 ).

For the following exercises, write the equation of the parabola in standard form, and give the vertex, focus, and equation of the directrix.

12.

y 2 +10x=0 y 2 +10x=0

13.

3 x 2 −12x−y+11=0 3 x 2 −12x−y+11=0

For the following exercises, graph the parabola, labeling the vertex, focus, and directrix.

14.

( x−1 ) 2 =−4( y+3 ) ( x−1 ) 2 =−4( y+3 )

15.

y 2 +8x−8y+40=0 y 2 +8x−8y+40=0

16.

Write the equation of a parabola with a focus at ( 2,3 ) ( 2,3 ) and directrix y=−1. y=−1.

17.

A searchlight is shaped like a paraboloid of revolution. If the light source is located 1.5 feet from the base along the axis of symmetry, and the depth of the searchlight is 3 feet, what should the width of the opening be?

For the following exercises, determine which conic section is represented by the given equation, and then determine the angle θ θ that will eliminate the xy xy term.

18.

3 x 2 −2xy+3 y 2 =4 3 x 2 −2xy+3 y 2 =4

19.

x 2 +4xy+4 y 2 +6x−8y=0 x 2 +4xy+4 y 2 +6x−8y=0

For the following exercises, rewrite in the x ′ y ′ x ′ y ′ system without the x ′ y ′ x ′ y ′ term, and graph the rotated graph.

20.

11 x 2 +10 3 xy+ y 2 =4 11 x 2 +10 3 xy+ y 2 =4

21.

16 x 2 +24xy+9 y 2 −125x=0 16 x 2 +24xy+9 y 2 −125x=0

For the following exercises, identify the conic with focus at the origin, and then give the directrix and eccentricity.

22.

r= 3 2−sinθ r= 3 2−sinθ

23.

r= 5 4+6cosθ r= 5 4+6cosθ

For the following exercises, graph the given conic section. If it is a parabola, label vertex, focus, and directrix. If it is an ellipse or a hyperbola, label vertices and foci.

24.

r= 12 4−8sinθ r= 12 4−8sinθ

25.

r= 2 4+4sinθ r= 2 4+4sinθ

26.

Find a polar equation of the conic with focus at the origin, eccentricity of e=2, e=2, and directrix: x=3. x=3.

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