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Aufmann - Algebra: Beginning and Intermediate 2/e (Homework)

James Finch

Math - Developmental, Fall 2010

Instructor: Dr. Friendly

Current Score: 23/27

Due: Wednesday, August 18, 2010 22:45 EDT

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Question
Points
1 2 3 4 5 6 7 8 9 10
2 1 0/1 7 4 1 2 1/3 2 3/4
Total
23/27

Description

Here are some textbook questions from Algebra: Beginning and Intermediate 2/e by Richard N. Aufmann, Joanne S. Lockwood published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. 2/2 points All Submissions Notes Question: AufBIAlg2 1.1.094.
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2/2
 
A meteorologist may report a wind-chill temperature. This is the equivalent temperature, including the effects of wind and temperature, that a person would feel in calm air conditions. The table below gives the wind-chill temperature for various wind speeds and temperatures. For instance, when the temperature is 5°F and the wind is blowing at 15 mph, the wind-chill temperature is -13°F.
Which of the following weather conditions feels warmer?
(a)
    

Your answer is correct.

(b)
    

Your answer is correct.


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2. 1/1 points All Submissions Notes Question: AufBIAlg2 1.2.152.
Question part
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1
1
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1/1
 
The table below shows the average temperatures at different cruising altitudes for airplanes. What is the difference between the average temperature at 40,000 ft and the average temperature at 12,000 ft?
Enter an exact number.
Your answer is correct. °F

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3. 0/1 points All Submissions Notes Question: AufBIAlg2 1.3.182.
Question part
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0/1
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0/1
 
Classify the following number. List all that apply.
−
2
49

Your answer is incorrect.



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4. 7/7 points All Submissions Notes Question: AufBIAlg2 1.4.002.
Question part
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1 2 3 4 5 6 7
1 1 1 1 1 1 1
1/50 1/50 6/50 1/50 1/50 1/50 1/50
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7/7
 
The exponential expression 53 is read "the
Answer is not case sensitive.
Your answer is correct. power of
Answer is not case sensitive.
Your answer is correct." or "5
Answer is not case sensitive.
Your answer is correct.." To evaluate 53, find the product (
Enter an exact number.
Your answer is correct.)(
Enter an exact number.
Your answer is correct.)(
Enter an exact number.
Your answer is correct.) =
Enter an exact number.
Your answer is correct..

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5. 4/4 points All Submissions Notes Question: AufBIAlg2 1.5.164.
Question part
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1 2 3 4
1 1 1 1
1/50 1/50 1/50 1/50
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4/4
 
When simplifying 5(2a − 8) + 2(a − 3), the first step is to use the Distributive Property to remove parentheses:
5(2a − 8) + 2(a − 3) = (
Enter an exact number.
Your answer is correct.)a −
Enter an exact number.
Your answer is correct. + (
Enter an exact number.
Your answer is correct.)a −
Enter an exact number.
Your answer is correct.

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6. 1/1 points All Submissions Notes Question: AufBIAlg2 1.5.174.
Question part
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1
1
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1/1
 
Simplify.
13(y - 3) + 2(7 - 2y)
<math><mrow><mn>9</mn><mi>y</mi><mo>-</mo><mn>25</mn></mrow></math> Your answer is correct.

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7. 2/2 points All Submissions Notes Question: AufBIAlg2 1.6.064.
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2/2
 
Translate into a variable expression. Then simplify the expression.
a number s added to the product of four and the number
<math><mrow><mi>s</mi><mo>+</mo><mn>4</mn><mi>s</mi></mrow></math> Your answer is correct. (variable expression)
<math><mrow><mn>5</mn><mi>s</mi></mrow></math> Your answer is correct. (simplified)

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8. 1/3 points All Submissions Notes Question: AufBIAlg2 1.6.096.SBS.
Question part
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1 2 3
1 0/1 0/1
2/50 0/50 0/50
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1/3
 
Translate into a variable expression. Then simplify the expression.
a number t plus three added to the difference between five and twice the number

STEP 1: Identify the words that indicate mathematical operations. (Select all that apply.)

Your answer is correct.
STEP 2: Use the operations to write the variable expression.


STEP 3: Simplify the expression.

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9. 2/2 points All Submissions Notes Question: AufBIAlg2 1.6.104.
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An electrician's bill is $115 for materials and $35 an hour for labor. To express the total amount of the bill in terms of the number of hours of labor, let h be the number of hours of labor. Then the cost of the labor is <math><mrow><mn>35</mn><mi>h</mi></mrow></math> Your answer is correct. dollars, so the total amount for the materials and labor is <math><mrow><mn>35</mn><mi>h</mi><mo>+</mo><mn>115</mn></mrow></math> Your answer is correct. dollars.

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10. 3/4 points All Submissions Notes Question: AufBIAlg2 9.6.020.
Question part
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1 2 3 4
1 1 1 0/1
2/50 2/50 2/50 0/50
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3/4
 
Find the vertex and axis of symmetry given by the following equation. Then graph the equation.
y = x2 – 4x
vertex
(
Enter an exact number.
Your answer is correct.,
Enter an exact number.
Your answer is correct. )

axis of symmetry
x =
Enter an exact number.
Your answer is correct.

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