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

James Finch

Math - Developmental, Fall 2010

Instructor: Dr. Friendly

Current Score: 2/16

Due: Wednesday, October 13, 2010 23:00 EDT

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

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.
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Identify the coefficient of the term. See Example 3.
− 
7x
8
 
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.
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Expand the expression as a product of factors. See Example 4.
(x + y)3

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3. 0/1 points All Submissions Notes Question: LarElemAlg5 2.1.059.MI.
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Rewrite the product in exponential form.
–7 · (xy) · (xy) · (xy) · (xy) · (–7)
<math><mrow><mo>-</mo><msup><mn>7</mn><mn>2</mn></msup><msup><mfenced close=")" open="("><mi>x</mi><mo>-</mo><mi>y</mi></mfenced><mn>4</mn></msup></mrow></math> Your answer is incorrect.


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4. –/2 points Notes Question: LarElemAlg5 2.1.087.
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An advertisement for a new pair of basketball shoes claims that the shoes will help you jump two 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 24 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.
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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 = 7
area
area if x = 7     
Enter an exact number.
square units


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6. 2/2 points All Submissions Notes Question: LarElemAlg5 2.2.034.
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2/2
 
Complete the statement. Then state the property of algebra that you used. See Example 1.
–5 + (2 + 5y) = ( <math><mrow><mo>-</mo><mn>5</mn><mo>+</mo><mn>2</mn></mrow></math> Your answer is correct.) + 5y

    

Your answer is correct.


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7. –/1 points Notes Question: LarElemAlg5 2.2.120.MI.
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0/1
 
Simplify the expression. See Examples 7 and 8.
(2r2s3)(2rs)



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8. –/1 points Notes Question: LarElemAlg5 2.3.004.
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Match the verbal phrase with the correct algebraic expression. See Examples 2 and 3.
Seventeen less than the product of 3 and x
    


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9. –/2 points Notes Question: LarElemAlg5 2.4.012.
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Determine whether the value of x is a solution of the equation. See Examples 1 and 2.
x2 = 632x
(a)     x = 7
    



(b)     x = -9
    


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10. –/2 points Notes Question: LarElemAlg5 2.4.059.MI.
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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.
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Write an algebraic equation. Do not solve the equation. See Examples 4, 5, and 6.
You hear thunder 4 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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