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Faires and DeFranza - Precalculus 5/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 26 / 26

Due : Sunday, January 27, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6 7 8
2/2 2/2 1/1 2/2 4/4 1/1 8/8 6/6
Total
26/26 (100.0%)

  • Instructions

    Here are some textbook questions from Precalculus 5/e by J. Douglas Faires and James DeFranza published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

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1. 2/2 points  |  Previous Answers FDPreCalc5 1.2.001. My Notes
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Submissions Used
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2/2
 
Express the interval using inequalities.
[−3, 1]
    

Give a sketch of the numbers in the interval.
Use the tools to enter your answer.
Created with Raphaël 2.1.0-10-8-6-4-20246810
Created with Raphaël 2.1.0

NO SOLUTION

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2. 2/2 points  |  Previous Answers FDPreCalc5 1.3.006. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
3/50 1/50
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2/2
 
Consider the following points.
(−5, 8), (7, 6)
(a) Find the distance between the points.
2√37
Correct: Your answer is correct.

(b) Find the midpoint of the line segment joining the points.
(x, y) = 
 Correct: Your answer is correct.

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3. 1/1 points  |  Previous Answers FDPreCalc5 1.3.015. My Notes
Question Part
Points
Submissions Used
1
1/1
1/50
Total
1/1
 
Indicate on an xy-plane those points (x, y) for which the statement holds.
−7 < y ≤ 3
No Solution
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4. 2/2 points  |  Previous Answers FDPreCalc5 1.3.026. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
1/50 1/50
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2/2
 
Find the standard form of the equation of the circle.
center (−5, 2);
    radius 5
(x+5)2+(y−2)2=25
Correct: Your answer is correct.

Sketch the graph.
No Solution
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5. 4/4 points  |  Previous Answers FDPreCalc5 1.4.013. My Notes
Question Part
Points
Submissions Used
1 2 3 4
1/1 1/1 1/1 1/1
1/50 1/50 2/50 1/50
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4/4
 
Determine any axis intercepts. (If an answer does not exist, enter DNE.)
y = x2 − 2
x-intercept    (x, y) = 
−√2,0
Correct: Your answer is correct.
 (smaller x-value)
x-intercept    (x, y) = 
√2,0
Correct: Your answer is correct.
 (larger x-value)
y-intercept    (x, y) = 
0,−2
Correct: Your answer is correct.
 


Describe any axis or origin symmetry. (Select all that apply.)
Correct: Your answer is correct.

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6. 1/1 points  |  Previous Answers FDPreCalc5 1.5.016. My Notes
Question Part
Points
Submissions Used
1
1/1
8/50
Total
1/1
 
Use a graphing device to approximate, to two decimal places, the values of x where the graphs of the equations intersect. (Enter your answers as a comma-separated list.)
y = x3 + 15
y = 
11
2
x2 + 17x
x = Correct: Your answer is correct.
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7. 8/8 points  |  Previous Answers FDPreCalc5 1.6.002. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8
1/1 1/1 1/1 1/1 1/1 1/1 1/1 1/1
1/50 1/50 1/50 1/50 1/50 1/50 1/50 2/50
Total
8/8
 
If
f(x) = 
x + 36
,
 find the following.
(a)    
f(−26)

√10
Correct: Your answer is correct.

(b)    
f(0)

6
Correct: Your answer is correct.

(c)    
f(36)

6√2
Correct: Your answer is correct.

(d)    
f(13)

7
Correct: Your answer is correct.

(e)    
f(a)

√a+36
Correct: Your answer is correct.

(f)    
f(2a − 4)

√2a+32
Correct: Your answer is correct.

(g)    
f(x + h)

√x+h+36
Correct: Your answer is correct.

(h)    
f(x + h) − f(x)

√x+h+36−√x+36
Correct: Your answer is correct.
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8. 6/6 points  |  Previous Answers FDPreCalc5 1.8.029. My Notes
Question Part
Points
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1 2 3 4 5 6
1/1 1/1 1/1 1/1 1/1 1/1
1/50 1/50 1/50 1/50 1/50 1/50
Total
6/6
 
Use the graph of the function shown in the accompanying figure to sketch the graphs.
WebAssign Plot
(I.) WebAssign Plot (II.) WebAssign Plot
(III.) WebAssign Plot (IV.) WebAssign Plot
(V.) WebAssign Plot (VI.) WebAssign Plot
(a)    
y = f(x − 1)

Correct: Your answer is correct.

(b)    
y = f(x − 1) + 4

Correct: Your answer is correct.

(c)    
y = f(x + 4)

Correct: Your answer is correct.

(d)    
y = f(x + 4) + 1

Correct: Your answer is correct.

(e)    
y = f(x + 4) − 1

Correct: Your answer is correct.

(f)    
y = f(x − 1) − 4

Correct: Your answer is correct.
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