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Larson and Hostetler - Elementary Algebra 5/e (Homework)

Chris Read

Mathematics and Sciences, section 2, Fall 2010

Instructor: Mr. Cengage

Current Score: 0/16

Due: Wednesday, September 1, 2010 07:00 PM EDT

About this Assignment

Question
Points
1 2 3 4 5 6 7 8 9 10 11
0/1 0/1 0/1 0/2 0/2 0/2 0/1 0/1 0/2 0/2 0/1
Total
0/16

Description

Here are some textbook questions from Elementary Algebra 5/e by Ron Larson and Robert P. Hostetler 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. 0/1 points All Submissions Notes Question: LarElemAlg5 2.1.030.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
Identify the coefficient of the term. See Example 3.
− 
5x
3
 
Enter an exact number as an integer, fraction, or decimal.
Your answer is incorrect.

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2. –/1 points Notes Question: LarElemAlg5 2.1.047.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Expand the expression as a product of factors. See Example 4.
(x + y)5

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3. –/1 points Notes Question: LarElemAlg5 2.1.059.MI.
Question part
Points
Submissions
1 2 3 4 5
0/1 0 0 0 0
0/50 0/50 0/50 0/50 0/50
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0/1
 
Rewrite the product in exponential form.
–3 · (x – y) · (x – y) · (x – y) · (x – y) · (x – y) · (–3) · (–3) · (–3)



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4. –/2 points Notes Question: LarElemAlg5 2.1.087.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
An advertisement for a new pair of basketball shoes claims that the shoes will help you jump five inches higher than without shoes.
(a) Let x represent the height (in inches) jumped without shoes. Write an expression that represents the height of a jump while wearing the new shoes.


(b) You can jump 15 inches without shoes. How high can you jump while wearing the new shoes?
Enter an exact number.
 in

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5. –/2 points Notes Question: LarElemAlg5 2.1.092.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Write an expression for the area of the figure. Then evaluate the expression for the given value of the variable. See Example 9.
x = 10
area
area if x = 10     
Enter an exact number.
 square units


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6. –/2 points Notes Question: LarElemAlg5 2.2.034.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Complete the statement. Then state the property of algebra that you used. See Example 1.
–15 + (4 + 9y) = ( ) + 9y

    


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7. –/1 points Notes Question: LarElemAlg5 2.2.120.MI.
Question part
Points
Submissions
1 2 3 4 5 6 7 8
0/1 0 0 0 0 0 0 0
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/1
 
Simplify the expression. See Examples 7 and 8.
(7r4s3)(5rs)



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8. –/1 points Notes Question: LarElemAlg5 2.3.004.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Match the verbal phrase with the correct algebraic expression. See Examples 2 and 3.
Twelve less than the product of 5 and x
    


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9. –/2 points Notes Question: LarElemAlg5 2.4.012.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
Determine whether the value of x is a solution of the equation. See Examples 1 and 2.
x2 = 32 – 4x
(a)     x = 4
    



(b)     x = -8
    


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10. –/2 points Notes Question: LarElemAlg5 2.4.059.MI.
Question part
Points
Submissions
1 2 3 4 5 6 7
0/1 0/1 0 0 0 0 0
0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/2
 
Simplify the expression. State the units of the simplified value.
 
3 feet
second
 · 
20 seconds
minute
 · (50 minutes)
Enter an exact number.

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11. –/1 points Notes Question: LarElemAlg5 2.4.075.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Write an algebraic equation. Do not solve the equation. See Examples 4, 5, and 6.
You hear thunder 2 seconds after seeing lightning. The speed of sound is 1100 feet per second. How far away is the lightning? (Let d represent the unknown quantity.)

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