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MAT/221 MAT221 MAT 221 WEEK 2 QUIZ

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MAT 221 WEEK 2 QUIZ Quiz 1. Question : The presenter of the word problem in the Video, Example 88 Solve the Application, which is located in the media section of Chapter 2, chose to use which letter for the variable? Student Answer: h, since it represents hours c, since we are finding the cost p, since it represents the amount the plumber billed for his services x, since it is the most common variable used in solving equations Question 2. Question : The presenter of example 54, The Multiplication Property of Equality: Coefficient of –1, which is located in the media section of Chapter 2, states that a way of expressing the solution of an equation is by putting the answer in Student Answer: brackets braces parentheses absolute value bars Question 3. Question : When looking at 3x = 2x +9, the example of the video, Example 62 Variables on Both Sides, which is located in the media section of Chapter 2, the x-terms on the right side will cancel out. Which of the following reasons does not support this cancellation? Student Answer: The two x-terms are additive inverses. Two minus two is zero. 2x divided by 2x is one. A term with a coefficient of zero should not be written. Question 4. Question : The example presented in the slideshow, Simplifying the Process, which is located in the media section of Chapter 2, illustrates that 4x is not subtracted from both sides because the result would be –x. Therefore, an extra step would be needed to find the solution. Being able to see ahead may help to reduce the number of steps needed to solve an equation. Student Answer: True False Question 5. Question : The presenter of example 50, The Multiplication Property of Equality: Fractional Coefficient which is located in the media section of Chapter 2, says that when solving for t, both sides of the equation need to be multiplied by Student Answer: 2/5 –2/5 –3/5 –5/3

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