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Aufmann - Beginning Algebra with Applications 7/e (Homework)

James Finch

Math - Developmental, Fall 2010

Instructor: Dr. Friendly

Current Score: 6/46

Due: Wednesday, August 18, 2010 23:10 EDT

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Question
Points
1 2 3 4 5 6 7 8 9 10
1/6 1 1/11 1 1 0/6 0/1 1 0/4 0/14
Total
6/46

Description

Here are some textbook questions from Beginning Algebra with Applications 7/e by Richard N. Aufmann, Vernon C. Barker, 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. 1/6 points All Submissions Notes Question: AufBAlgAp7 3.1.036.MI.
Question part
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Submissions
1 2 3 4 5 6
1 0/1 0/1 0/1 0/1 0/1
1/50 0/50 0/50 0/50 0/50 0/50
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1/6
 
Solve and check.
z − 7 = 11
z =
Enter an exact number.
Your answer is correct.


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2. 1/1 points All Submissions Notes Question: AufBAlgAp7 3.1.088.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
Solve and check.
7x = 28
x =
Enter an exact number.
Your answer is correct.

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3. 1/11 points All Submissions Notes Question: AufBAlgAp7 3.1.156.MI.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9 10 11
1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
6/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
1/11
 
K&B River Tours offers a river trip that takes passengers from the K&B dock to a small island that is 24 mi away. The passengers spend 2 h at the island and then return to the K&B dock. If the speed of the boat is 11 mph in calm water and the rate of the current is 1 mph, how long does the trip last?
Enter an exact number.
Your answer is correct. hr


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4. 1/1 points All Submissions Notes Question: AufBAlgAp7 3.2.028.
Question part
Points
Submissions
1
1
2/50
Total
1/1
 
Solve and check.
5y + 4 = 7
y =
Enter a reduced fraction.
Your answer is correct.

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5. 1/1 points All Submissions Notes Question: AufBAlgAp7 3.2.126.
Question part
Points
Submissions
1
1
1/50
Total
1/1
 
Solve and check.
7n + 9 = 2n + 8
n =
Enter a reduced fraction.
Your answer is correct.

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6. –/6 points Notes Question: AufBAlgAp7 3.2.174.MI.
Question part
Points
Submissions
1 2 3 4 5 6
0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50
Total
0/6
 
Black ice is an ice covering on roads that is especially difficult to see and therefore extremely dangerous for motorists. The distance that a car traveling 30 mph will slide after its brakes are applied is related to the outside temperature by the formula below where C is the Celsius temperature and D is the distance in feet that the car will slide. Determine the distance a car will slide on black ice when the outside temperature is -9°C.
C = 
1
4
D − 45
Enter an exact number.
 ft



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7. –/1 points Notes Question: AufBAlgAp7 3.2.188.
Question part
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0/1
 
To determine the break-even point, or the number of units that must be sold so that no profit or loss occurs, an economist uses the equation below where P is the selling price per unit, x is the number of units sold, C is the cost to make each unit, and F is the fixed cost.
Px = Cx + F
A manufacturing engineer determines that the cost per unit for a compact disc is $3.85 and that the fixed cost is $5100. The selling price for the compact disc is $9.00. Find the break-even point. (Round your answer to the nearest integer.)
Enter a number.
 compact discs.

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8. 1/1 points All Submissions Notes Question: AufBAlgAp7 3.3.046.
Question part
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Submissions
1
1
2/50
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1/1
 
Solve.
n - 5.73 ≤ 3.79
<math><mrow><mi>n</mi><mo>&le;</mo><mn>9.52</mn></mrow></math> Your answer is correct.

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9. –/4 points Notes Question: AufBAlgAp7 3.3.098.MI.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50
Total
0/4
 
Solve.
2.1x ≤ 4.41



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10. –/14 points Notes Question: AufBAlgAp7 3.3.152.MI.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9 10 11 12 13 14
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
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
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0/14
 
Use the roster method to list the set of integers that are common to the solution sets of the two inequalities. (Enter your answers as a comma-separated list.)
5x − 4 > 7x − 2
6x − 4 < 8x + 7
 
Enter a mathematical expression or equation with exact values.
 


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