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Cohen et al - Precalculus 7/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 15 / 16

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
1/1 4/4 2/2 1/1 1/1 3/3 3/4
Total
15/16 (93.8%)

  • Instructions

    Create your course assignments by selecting questions from our bank of end-of-section exercises, as well as enhanced interactive examples with videos.

    While doing their homework, students can link to the relevant interactive examples from the book and work through them again and again for additional practice before answering the question.

    Students can view and hear additional instruction through the 2-5 minute Watch It links. Students will also find helpful links to online excerpts from their textbook, tutorials, and videos.

    Read It - relevant textbook pages

    Watch It - videos of worked examples

    In this assignment we present several textbook question types found in Precalculus 7/e by David Cohen, Theodore B. Lee, and David Sklar published by Brooks/Cole. 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.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. 1/1 points  |  Previous Answers CohenPCalc7 1.2.053. My Notes
Question Part
Points
Submissions Used
1
1/1
20/50
Total
1/1
 
The set of real numbers satisfying the given inequality is one or more intervals on the number line. Show the interval(s) on a number line.
|x − 6| < 2
Use the tools to enter your answer.
Created with Raphaël 2.1.00123456789101112
Created with Raphaël 2.1.0

NO SOLUTION

Help
Correct: Your answer is correct.

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2. 4/4 points  |  Previous Answers CohenPCalc7 3.1.006. My Notes
Question Part
Points
Submissions Used
1 2 3 4
1/1 1/1 1/1 1/1
8/50 4/50 6/50 2/50
Total
4/4
 
Two sets A and B are defined as follows:
A = {x, y, z}; B = {1, 2, 3}.
(a) Which of the rules displayed in the figures represent functions from A to B? (Select all that apply.)
Correct: Your answer is correct.


(b) For each rule that does represent a function, specify the range. (If the rule does not represent a function, enter NOT A FUNCTION.)
range of F     { Correct: Your answer is correct. }
range of G    { Correct: Your answer is correct. }
range of H    { Correct: Your answer is correct. }
Your work in question(s) will also be submitted or saved.
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3. 2/2 points  |  Previous Answers CohenPCalc7 3.2.003. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
3/50 2/50
Total
2/2
 
Specify the y-coordinate of the point P on the graph of the given function. Give an exact expression and a calculator approximation rounded to three decimal places. Let a = 3.
y =
1√3​
Correct: Your answer is correct. ≈ Correct: Your answer is correct.

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4. 1/1 points  |  Previous Answers CohenPCalc7 3.3.009. My Notes
Question Part
Points
Submissions Used
1
1/1
2/50
Total
1/1
 
Compute the average rate of change of the function on the given interval.
f(x) = x2 + 3x on [4, 6]
Correct: Your answer is correct.

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5. 1/1 points  |  Previous Answers CohenPCalc7 3.4.054. My Notes
Question Part
Points
Submissions Used
1
1/1
4/50
Total
1/1
 
Reflect the graph of
y = 
x
 in the y-axis and then translate that seven units to the left. What is the equation of the resulting graph? Hint: The answer is not
y = 
−x + 7
.

y =
√−(x +7)
Correct: Your answer is correct.
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6. 3/3 points  |  Previous Answers CohenPCalc7 3.5.001. My Notes
Question Part
Points
Submissions Used
1 2 3
1/1 1/1 1/1
1/50 1/50 7/50
Total
3/3
 
Compute each expression, given that the functions f and g are defined as follows:
f(x) = 3x − 2
g(x) = x2 − 4x − 8
(a)    
(f + g)(x)
x2−x−10
Correct: Your answer is correct.

(b)    
(f − g)(x)
−x2+7x+6
Correct: Your answer is correct.

(c)    
(f − g)(0)

6
Correct: Your answer is correct.

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7. 3/4 points  |  Previous Answers CohenPCalc7 3.6.018. My Notes
Question Part
Points
Submissions Used
1 2 3 4
1/1 0/1 1/1 1/1
1/50 3/50 2/50 2/50
Total
3/4
 
Refer to the following figure, which shows the graph of a function f. (The axes are marked off in one-unit intervals.) In each case, graph the indicated function.
(a)    
y = f −1(x)
No Solution
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Submission Data

(b)    
y = f −1(x − 4)
No Solution
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(c)    
y = f −1(x) − 4
No Solution
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(d)    
y = f −1(x − 4) − 4
No Solution
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Submission Data

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