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Kaufmann & Schwitters - Elem & Interm Algebra 5/e (Homework)

James Finch

Math - Developmental, Fall 2010

Instructor: Dr. Friendly

Current Score: 6/19

Due: Saturday, October 9, 2010 22:00 EDT

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Question
Points
1 2 3 4 5 6 7 8
2 2 0/2 1/3 0/4 0/2 0/2 1/2
Total
6/19

Description

Create your course assignments by selecting questions from our bank of 1500 end-of-section exercises, as well as enhanced interactive examples with videos.

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In this assignment we present several textbook question types found in Chapter 11 on Quadratic Equations and Inequalities in Elementary and Intermediate Algebra 5/e by Jerome E. Kaufmann and Karen L. Schwitters published by Brooks/Cole.


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: KaufEIAlg5 11.2.001.
Question part
Points
Submissions
1 2
1 1
2/50 1/50
Total
2/2
 
Solve the quadratic equation by factoring and applying the property, ab = 0 if and only if a = 0 or b = 0. If necessary, review the factoring techniques.
x**2-41 x=0
x =
Enter a mathematical expression.
Your answer is correct. (smaller value)
x =
Enter a mathematical expression.
Your answer is correct. (larger value)

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2. 2/2 points All Submissions Notes Question: KaufEIAlg5 11.2.053.
Question part
Points
Submissions
1 2
1 1
2/50 2/50
Total
2/2
 
Use the following property to help solve the quadratic equation.
For any real number a, x2 = a if and only if x = √a or x = -√a.
(Enter your answers from smallest to largest real part. If two real parts are the same, enter the one with the negative imaginary part first. Do not use mixed numbers in your answers. If there is only one solution, enter NONE in the last box.)
(x-4)**2 = 1
x = <math><mrow><mn>3</mn></mrow></math> Your answer is correct.
x = <math><mrow><mn>5</mn></mrow></math> Your answer is correct.

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3. –/2 points Notes Question: KaufEIAlg5 11.3.018.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Use the method of completing the square to solve the quadratic equation. (Enter your answers from smallest to largest real value. If two real values are the same, enter the one with the smallest imaginary part first.)
x**2 + 4 x -41 = 0
x =
x =

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4. 1/3 points All Submissions Notes Question: KaufEIAlg5 11.4.006.
Question part
Points
Submissions
1 2 3
1 0/1 0/1
2/50 0/50 0/50
Total
1/3
 
Use the discriminant to determine whether the equation has two nonreal complex solutions, one real solution with a multiplicity of two, or two real solutions. Then solve the equation.
9 x**2 - x + 9 = 0
    

Your answer is correct.



(Enter solutions from smallest to largest. If the solutions are complex, enter them from smallest to largest value of the imaginary part. If there is one solution with a multiplicity of two, enter it in both answer boxes. Do not use mixed numbers in your answers.)
x =
x =

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5. –/4 points Notes Question: KaufEIAlg5 11.5.027.
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 the equation. (Enter your answers from smallest to largest real value. If two real values are the same, enter the one with the smallest imaginary part first. Do not use mixed numbers in your answers. Enter NONE in any unused answer boxes.)
4/(x-1) - 1/x = 2/5
x =
x =
x =
x =

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6. –/2 points Notes Question: KaufEIAlg5 11.5.053.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Set up an equation and solve the problem.
The perimeter of a rectangle is 48 inches, and its area is 135 square inches. Find the length and width of the rectangle.
inches (width)
inches (length)

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7. –/2 points Notes Question: KaufEIAlg5 11.5.056.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Set up an equation and solve the problem.
Larry drove 204 miles in 1 hour more than it took Terrell to drive 165 miles. Terrell drove at an average rate of 4 miles per hour faster than Larry. How fast did each one travel?
miles per hour (Larry)
miles per hour (Terrell)

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8. 1/2 points All Submissions Notes Question: KaufEIAlg5 11.6.001.
Question part
Points
Submissions
1 2
1 0/1
2/50 0/50
Total
1/2
 
Solve the inequality and graph its solution set on a number line.
\(x + 6\) \(x - 4\) > 0

    

Your answer is correct.


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