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Larson and Hostetler - Precalculus 7/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 19 / 67

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

Last Saved : n/a Saving...  ()

Question
Points
1 2 3 4 5 6 7 8 9
2/2 9/9 2/2 5/6 1/1 –/1 –/1 –/36 –/9
Total
19/67 (28.4%)
  • Instructions

    Here are some textbook questions from Precalculus 7/e by Ron Larson and Robert Hostetler 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.

Assignment Submission

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1. 2/2 points  |  Previous Answers LarPCalc7 A.6.032. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
1/50 1/50
Total
2/2
 
Solve the inequality and sketch the solution on the real number line. (Some inequalities have no solutions.)
1
5
7
x > x1
     Correct: Your answer is correct.

Use the tools to enter your answer.
Created with Raphaël 2.1.00246810121416
Created with Raphaël 2.1.0

NO SOLUTION


Correct: Your answer is correct.

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2. 9/9 points  |  Previous Answers LarPCalc7 1.4.026.MI.SA. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9
1/1 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 1/50 2/50
Total
9/9
 
This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part.

Evaluate the function at the specified value of the independent variable and simplify.
g(y) = 6 7y
Part (a)
Evaluate g(0).
Step 1 of 1
Replace y with 0.
g(0) = 6 7
0 Correct: Your answer is correct. seenKey

0

 = 6 0 Correct: Your answer is correct. seenKey

0

 = 6 Correct: Your answer is correct. seenKey

6


Part (b)
Evaluate g
6
7
.
Step 1 of 1
Replace y with 
6
7
.
g
6
7
 = 6 7
6/7 Correct: Your answer is correct. seenKey

6/7

 = 6 6 Correct: Your answer is correct. seenKey

6

 = 0 Correct: Your answer is correct. seenKey

0


Part (c)
Evaluate g(s + 2).
Step 1 of 1
Replace y with s + 2.
g(s + 2) = 6 7
$$s+2
Correct: Your answer is correct. s + 2
 = 6  
$$7s+14
Correct: Your answer is correct. 7s + 14
 = 
$$7s8
Correct: Your answer is correct. -8 - 7s
You have now completed the Master It.

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3. 2/2 points  |  Previous Answers LarPCalc7 1.4.048.MI. My Notes
Question Part
Points
Submissions Used
1 2
1/1 1/1
1/50 1/50
Total
2/2
 
Find all real values of x such that f(x) = 0.
f(x) = 
14 x2
9
x = 
14
Correct: Your answer is correct.
(smaller value)
x = 
14
Correct: Your answer is correct.
(larger value)

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4. 5/6 points  |  Previous Answers LarPCalc7 2.1.018.MI. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
0/1 1/1 1/1 1/1 1/1 1/1
1/50 1/50 1/50 1/50 1/50 1/50
Total
5/6
 
Sketch the graph of the quadratic function without using a graphing utility. Identify the vertex, axis of symmetry, and x-intercept(s). (Enter NONE in any unused answer blanks.)
f(x) = (x 5)2 + 6
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
2
4
6
8
10
12
14
16
18
20
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
2
4
6
8
10
12
14
16
18
20

Graph LayersToggle Open/Closed

Submission Data



vertex (x, y) = ( , )
axis of symmetry     
i=5
x-intercepts (x, y) = ( , )

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5. 1/1 points  |  Previous Answers LarPCalc7 2.1.044. My Notes
Question Part
Points
Submissions Used
1
1/1
2/50
Total
1/1
 
Write the standard form of the equation of the parabola that has the indicated vertex and whose graph passes through the given point.
Vertex: (5, 1);   point: (7, 7)
f(x) =
2(x5)21
Correct: Your answer is correct.

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6. /1 points LarPCalc7 4.7.056.MI. My Notes
Question Part
Points
Submissions Used
1
/1
0/50
Total
/1
 
Find the exact value of the expression. (Hint: Sketch a right triangle.)
tan
arcsin
 
10
11
 

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7. /1 points LarPCalc7 4.7.058. My Notes
Question Part
Points
Submissions Used
1
/1
0/50
Total
/1
 
Find the exact value of the expression. (Hint: Sketch a right triangle. Enter your answer in radians.)
cot
arctan
4
3
 

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8. /36 points LarPCalc7 8.1.034.SBS. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
/1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1 /1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
/36
 
Write the matrix in row-echelon form. (Remember that the row-echelon form of a matrix is not unique.)
1213
37514
2138
STEP 1: Multiply R1 by 3 and add to R2.
 
 
 
 


STEP 2: Multiply R1 by 2 and add to R3.
 
 
 
 


STEP 3: Multiply R2 by 3 and add to R3.
 
 
 
 


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9. /9 points LarPCalc7 8.1.038. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9
/1 /1 /1 /1 /1 /1 /1 /1 /1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
/9
 
Use the matrix capabilities of a graphing utility to write the matrix in reduced row-echelon form.
 
 
264
154527
82440
 
 
 
 
 
 

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