Quiz #3 ​10 Questions

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Math 009 Quiz 3 Professor: Dr. Tiffany DePriter Name________________________________ Instructions: • • • • • The quiz is worth 100 points. There are 10 problems, each worth 10 points. Your score on the quiz will be converted to a percentage and posted in your assignment folder with comments. This quiz is open book and open notes, and you may take as long as you like on it provided that you submit the quiz no later than the due date posted in our course schedule of the syllabus. You may refer to your textbook, notes, and online classroom materials, but you may not consult anyone. You must show all of your work to receive full credit. If a problem does not seem to require work, write a sentence or two to justify your answer. Please type your work in your copy of the quiz, or if you prefer, create a document containing your work. Scanned work is also acceptable. Be sure to include your name in the document. Review instructions for submitting your quiz in the Quizzes Module. If you have any questions, please contact me by e-mail (tiffany.depriter@umuc.edu). At the end of your quiz you must include the following dated statement with your name typed in lieu of a signature. Without this signed statement you will receive a zero. I have completed this quiz myself, working independently and not consulting anyone except the instructor. I have neither given nor received help on this quiz. Name: Date: Please remember to show ALL of your work on every problem. If there is no work to show, then include a sentence or two explaining your answer. Here are the basic rules of showing work: a) Each step should show the complete expression or equation rather than a piece of it. b) Each new step should follow logically from the previous step, following rules of algebra. c) Each new step should be beneath the previous step. d) The equal sign, =, should only connect equal numbers or expressions. Math 009 – Quiz 3 Page 2 1) Are the following equations equivalent? Explain your answer. x 2 = 25 and x = 5 2) We often use the order of operations when solving an equation. What is the order of operations? List each component. Math 009 – Quiz 3 Page 3 3) The following work contains an error. Identify the error. − 8( x − 2) = 24 − 8 x − 16 = 24 − 8x = 8 x = −1 For problems 4-8, solve the equation and include a check of the solution. 4) 3 − 2 ( x + 1) = x −11 Math 009 – Quiz 3 Page 4 5) 6) 3x − 7 = x + 2 ( x − 4 ) 5 ( y − 3) = 2y +3 4 Math 009 – Quiz 3 Page 5 7) −3 ( 2 x − 4 ) = 2 ( 5 − 3x ) + 2 8) 1.5x −12.2 = 1.2 x − 2 Math 009 – Quiz 3 Page 6 9) Christine and Peter earn a combined annual income of $190,500. If Christine earns $30,500 per year more than Peter, what are their individual annual salaries? Please set up and solve this problem following the steps below: a) b) c) d) Define the unknown quantities in terms of one variable. Translate the question into an equation. Solve the equation, showing all work. Write a complete answer to the question asked, including appropriate units. 10) The new iPhone 6 Plus has a perimeter of 471.8 millimeters. The height of the new phone is 2.5 millimeters more than twice its width. Find the dimensions of the new phone. Please set up and solve this problem following the steps below: a) b) c) d) Define the unknown quantities in terms of one variable. Translate the question into an equation. Solve the equation, showing all work. Write a complete answer to the question asked, including appropriate units. Math 009 – Quiz 3 Page 7 End of quiz: please do not forget to write and sign (or type) the required statement explained in the box on Page 1 of the quiz.

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