Math 140: Unit 2

Due Date: Wednesday, September 25, 2002

Topics
Unit 2 starts with A.5, which is a review of solving linear equations, quadratic equations and equations with absolute values. Then we study the Rectangular Coordinates in 1.1, Graphs of Equations in 1.2 and Lines in 1.3

• Solving Equations (A.5)
  • linear equations
  • quadratic equations
  • equations with absolute values
• Rectangular Coordinates (1.1)
  • distance between two points
  • mid point between two points
• Graphs of Equations (1.2)
  • graph by plot points
  • x and y -intercepts of a graph
  • symmetries of a graph
  • circle
• Lines (1.3)
  • equation of a line
  • slopes and intercepts
  • point-slope form
  • parallel and perpendicular lines

In order to be successful in later math, science, and business courses, it is extremely important to be able to perform basic algebra manipulations. Therefore, calculators will not be allowed on Unit Exam #2. 

Study guidelines

• Sections A.5 Appendix A: Solving Equations
  • Reading: Appendix section A.5
  • Problems: Work through a representative sampling of the suggested problems in section A.5 listed below until you feel confident that you know the material. 
    • A.5: # 5, 9, 15, 17, 19, 21, 23, 29, 33, 37, 41, 47, 51, 55, 57, 65, 71, 77, 79, 83, 87, 95, 97, 99, 101, 105, 107, 113.
      
      
• Sections 1.1: Graphs
  • Reading: Chapter 1.1
  • Problems: Work through a representative sampling of the suggested problems in sections 1.1 listed below until you feel confident that you know the material. 
    • 1.1: # 1, 3, 5, 13, 15, 19, 23, 25-28, 31, 41-44.
      
      
• Sections 1.2 : Graphs of Equations
  • Reading: Chapter 1.2
  • Problems: Work through a representative sampling of the suggested problems in sections 1.2 listed below until you feel confident that you know the material. 
    • 1.2: # 3, 5, 7, 11-18, 23, 25, 33, 41, 43, 45, 47, 57, 59, 67, 69, 77, 85.
      
      
• Sections 1.3: Lines
  • Reading: Chapter 1.3
  • Problems: Work through a representative sampling of the suggested problems in sections 1.3 listed below until you feel confident that you know the material. 
    • 1.3: # 1, 7, 9, 13, 15, 17, 19, 21, 25, 27, 33, 43, 45, 47, 49, 57, 59, 75, 77.
      
      
• Supplementary material (optional) for Appendix A and Chapter 1:
  • Student Solutions Manual for Chapter 1 (see note)
  • Video lectures are available in the Media Reserve room of the ISU library. They are listed under Math 140: Poon.
  • For tutoring help, visit the Prentice Hall Tutor Center. Tutors can be contacted by phone, fax, or e-mail. To register, you will need the access code that came with your textbook.
  • The MathPak5 web site contains other resources such as Reading Quizzes and links to other interesting and fun math sites.

Unit Exam #2
After completing the above work, do the following:

1. Read the exam description:
   • This exam has 15 questions, and will count 15 points toward your grade. 
   • The exam has a one hour time limit.
   • In order to be successful in later math, science, and business courses, it is extremely important to be able to perform basic algebra manipulations. Therefore, calculators will not be allowed on Unit Exam #2. 
   • All of your answers in Unit Exam #2 must be exact. 
   • Some questions in this unit are multiple choice. For the other questions, be sure to look under the entry box for the expected format of the answer.
     • Many questions ask you to solve an equation. If the equation has more than one solution, separate the solutions with a semicolon. For example, your answer might be 3;5. This type of answer will always be explained in detail in the problem.
     • The answer to some questions is an ordered pair, such as (3,5).
     • The answer to some questions is a list of values in a specified order, separated by commas. This type of answer will always be explained in detail in the problem.
     • The answer to some problems is an equation (for example, the equation of a line). In this case, simply type in the equation. For example, your answer might be y=2x-3.
     • Type sqrt for square root. It is best to get into the habit of using parentheses with sqrt. For example, the square root of 3x should be typed as sqrt(3x) not sqrt 3x. The testing system would interpret the latter as (sqrt(3))*x).
       • Warning: The lower level TI calculators (86 and below) will allow you to enter sqrt 3x without parentheses. This is not standard mathematical notation, and in fact the higher level TI calculators (89 and 92) use the standard convention and force you to put the arguments of all functions within parentheses, just as you should when using online testing system (as shown above).
       • Use the Preview button to check your answer!
2. Complete the online Unit 2 Pretest assignment. You may use your book and notes if you wish.
   • Directions: Click on the link above, then choose the Unit 2 Pretest.
   • The pretest must be completed by the due date listed at the top of this page.
     However, you may redo the pretest as many times as you like before the due date.
     Your best score counts, and it will be rescaled to 5 points maximum.
3. If you are having trouble with any of the problems listed above or on the Pretest, spend some time working with the tutors listed on the Help page.
4. Go to the Math Computer Lab (449 Carver) to take the online proctored Unit 2 Exam. Remember to bring identification. You may NOT use your book or notes on this exam.
   • Directions: Click on the second link above, then choose the Unit 2 Exam.
   • The proctored unit exam should be completed by the due date listed at the top of this page, and may be repeated under certain conditions. See the Detailed Schedule page for specific rules.

   Note: Remember that you can always go back and take practice exams on this unit after the due date has passed. In particular, this will help you prepare for the midterm and final exams.

   • Directions: Click on the link above, then choose the Unit 2 Practice Exam.

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