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Larson - College Algebra 10/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 3 / 9

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
1/1 1/1 1/1 0/2 0/1 –/3
Total
3/9 (33.3%)

  • Instructions

    College Algebra, 10th edition, written by Ron Larson and published by Cengage Learning, is known for delivering sound explanations of mathematical concepts and carefully selected exercises to prepare students for further study in math. In this edition, Larson continues to transform the way students learn by including more real-world applications, ongoing review, and technology. The WebAssign component for this title engages students with many features, and links to a complete eBook.

    Question 1 enforces that the answer is written as a complex number and includes a Watch It.

    Question 2 grades all solutions written as a list. The prompt alerts the student to enter a comma-separated list of answers.

    Question 3 contains expression grading where any equivalent form of the expression is accepted. Also included are a Master It tutorial, Watch It, and solution.

    Question 4 demonstrates grading for factored expressions in the first answer blank. Also included are a Master It tutorial, Watch It, and solution.

    Question 5 highlights grading used for an expanded logarithm per the question instructions.

    Question 6 exhibits an expandable matrix answer blank that grades the matrix as a whole, and also handles answers for matrices that cannot be computed. Also included are a Master It tutorial, Watch It, and solution. 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.

    The answer key and solutions will display after the first submission for demonstration purposes. Instructors can configure these to display after the due date or after a specified number of submissions.

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 LarColAlg10 1.5.012. My Notes
Question Part
Points
Submissions Used
1
1/1
2/100
Total
1/1
 
Write the complex number in standard form.
6 + 
−81
dl9

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2. 1/1 points  |  Previous Answers LarColAlg10 2.3.024. My Notes
Question Part
Points
Submissions Used
1
1/1
2/100
Total
1/1
 
Find the zeros of the function algebraically. (Enter your answers as a comma-separated list.)
f(x) = 9x3 − 72x2 − x + 8
x =
8, 13​, −13​
Correct: Your answer is correct. webMathematica generated answer key
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3. 1/1 points  |  Previous Answers LarColAlg10 2.5.044.MI. My Notes
Question Part
Points
Submissions Used
1
1/1
2/100
Total
1/1
 
Write an equation for the function described by the given characteristics.
The shape of
f(x) = |x|,
 but shifted seven units to the left and eight units down
g(x) =
|x+7|−8
Correct: Your answer is correct. abs(x + 7) - 8

Solution or Explanation
f(x) = |x| moved 7 units to the left and 8 units down

g(x) = |x + 7| − 8

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4. 0/2 points  |  Previous Answers LarColAlg10 3.4.064.MI. My Notes
Question Part
Points
Submissions Used
1 2
0/1 0/1
1/100 1/100
Total
0/2
 
Write the polynomial as the product of linear factors.
g(x) = x2 + 10x + 18
g(x) =
4
Incorrect: Your answer is incorrect. webMathematica generated answer key


List all the zeros of the function. (Enter your answers as a comma-separated list.)
x =
6
Incorrect: Your answer is incorrect. webMathematica generated answer key


Solution or Explanation
g(x) = x2 + 10x + 18


By the Quadratic Formula, the zeros of g(x) are as follows.
x = 
−10 ± 
100 − 72
2
 = 
−10 ± 
28
2
 = −5 ± 
7
 

g(x) = (x + 5 + 
7
)(x + 5 − 
7
)

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5. 0/1 points  |  Previous Answers LarColAlg10 5.3.049. My Notes
Question Part
Points
Submissions Used
1
0/1
1/100
Total
0/1
 
Use the properties of logarithms to expand the expression as a sum, difference, and/or constant multiple of logarithms. (Assume all variables are positive.)
ln xyz6
4
Incorrect: Your answer is incorrect. webMathematica generated answer key
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6. –/3 points LarColAlg10 7.2.036.MI. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/100 0/100 0/100
Total
–/3
 
If possible, find AB and state the order of the result. (If not possible, enter IMPOSSIBLE.)
A = 
0−12
405
5−16
,    B = 
4−1
4−7
18
AB =


State the order of the result. (If not possible, enter IMPOSSIBLE in both answer blanks.)
×

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