Quiz 4 10 questions

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timer Asked: Jun 25th, 2018
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10 questions! :)









Math 012 Quiz 4 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 Unit 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. 1) Find the domain of the function: f ( x) = x−3 x − 7x − 8 2 Math 012 Quiz 4 2) Perform the indicated operations and simplify your answer: x 2 − 18 x + 81 5 x 2  2 25 x x − 81 3) Perform the indicated operation and simplify your answer: x2 + 6 x + 5 2x2 + 9x − 5  3x 2 − 9 x − 12 2 x 2 + 5 x − 3 Page 2 Math 012 Quiz 4 4) Perform the indicated operation and simplify your answer: 7 3 − x−4 x+5 5) Perform the indicated operation and simplify your answer: 6 x+2 + x −3 3− x Page 3 Math 012 Quiz 4 6) Solve the equation and show the check of your solution(s): 4 2 −1 = 2 x −1 x −1 7) Solve the equation and show the check of your solution(s): 3x 6 2x − 2 = x − 4 x − 7 x + 12 x − 3 Page 4 Math 012 Quiz 4 Page 5 8) One electrician can rewire a home in 15 hours. Her partner can rewire the same home in 9 hours. How long will it take the two electricians to rewire the home if they work together? 9) A plane flies 440 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 25 mph, find the speed of the plane in still air. Math 012 Quiz 4 Page 6 10) The weight of an object on or above the surface of Earth varies inversely as the square of the distance between the object and Earth’s center. If a person weighs 125 pounds on Earth’s surface, find the person’s weight 600 miles above the surface of the Earth. Assume that the radius of the Earth is 4000 miles. Round your answer to the nearest whole pound. End of quiz: please remember to sign and date the statement in the box on the first page of the quiz.

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Frank Rose
School: UT Austin

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Anonymous
Awesome! Exactly what I wanted.

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