Graded Exam #1.pdf - Graded Exam#1 Started on State...

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Unformatted text preview: 12/31/2017 Graded Exam #1 Started on State Completed on Time taken Grade Feedback Sunday, December 31, 2017, 1:46 AM Finished Sunday, December 31, 2017, 3:16 AM 1 hour 30 mins 112.50 out of 125.00 (90%) You’re off to a good start. A course grade of 70% is required to request a transcript. You’ve met that for the first exam already, but if you want to reattempt for a higher grade you can retake this assessment (only the first graded assessment in this course can be retaken). Study hard for each exam, and consider using tutoring anytime you get stuck. Remember that 10 hours of tutoring are provided to you through your StraighterLine membership. Question 1 Evaluate the expression. Correct (-11)2 6.25 points out of 6.25 Flag question Select one: a. -9 b. -121 c. 121 d. -22 The correct answer is: 121 Question 2 Simplify by writing the expression without absolute value bars. Correct for z < 15 6.25 points out of 6.25 Flag question Select one: a. 1 b. -1 c. 15 d. -15 1/9 12/31/2017 Graded Exam #1 The correct answer is: 1 Question 3 Express the set in interval notation. Incorrect 0.00 points out of 6.25 Flag question 9 Select one: a. (9, ∞) b. (-∞, 9] c. [-∞, 9] d. (-∞, 9) The correct answer is: (-∞, 9] Question 4 Apply the associative property of addition. Correct (r + 3) + 7 6.25 points out of 6.25 Flag question Select one: a. r +7 b. r +3 c. r + 10 d. r +4 The correct answer is: r + 10 Question 5 Simplify the expression. Write your answer with positive exponents only. Correct (t3z)2(3t-2z4)-2 6.25 points out of 6.25 Flag question Select one: a. 2/9 12/31/2017 Graded Exam #1 b. c. d. The correct answer is: Question 6 Simplify. Correct 6.25 points out of 6.25 Flag question Select one: a. b. c. d. 6p 3r 6q 9 The correct answer is: Question 7 Simplify the expression. Write your answer with positive exponents only. Correct 6.25 points out of 6.25 3/9 12/31/2017 Graded Exam #1 Flag question -2 -1 Select one: a. b. c. d. The correct answer is: Question 8 Correct 6.25 points out of 6.25 Flag question Multiply the radical expressions and simplify your answer. -3 ∙2 Select one: a. -12x3y4 b. -12 c. -24x3y4 d. -24xy The correct answer is: -12x3y4 Question 9 Correct Simplify the expression by using the properties of rational exponents. Write the final answer using positive exponents only. 4/9 12/31/2017 Graded Exam #1 6.25 points out of 6.25 1/2 Flag question Select one: a. t-2 b. t7 c. t-5 d. t4 The correct answer is: t4 Question 10 Correct 6.25 points out of 6.25 Flag question Subtract the radical expressions. Assume that all variables represent positive real numbers. Subtract the radical expressions. Assume that all variables represent positive real numbers. 3 Select one: a. 17 b. (18y - 1) c. 3 d. Cannot be simplified further The correct answer is: (18y - 1) Question 11 Correct 6.25 points out of 6.25 Flag question Multiply the radical expressions and simplify your answer. ( - ) Select one: a. 2 - 2+ b. 5/9 12/31/2017 Graded Exam #1 c. 2 d. 2 -6 - The correct answer is: 2 - Question 12 Choose the polynomial that is described. Incorrect A trinomial in one variable of degree 3 0.00 points out of 6.25 Flag question Select one: a. 4r2 - 9t + 7 b. 3r2 + 4t - 9 c. 4r3 d. 4r3 - 9t + 7 The correct answer is: 4r3 - 9t + 7 Question 13 Add the polynomials and simplify. Correct (4m4 - 8m3 - 7m) + (4m4 - 7m2 - 5m) 6.25 points out of 6.25 Flag question Select one: 4 a. 4m - 4m3 - 7m2 - 12m b. 8m4 - 8m3 - 7m2 - 2m c. 8m4 - 8m3 - 7m2 - 12m d. 8m4 - 8m3 - 14m2 - 5m The correct answer is: 8m4 - 8m3 - 7m2 - 12m Question 14 Correct 6.25 points out of 6.25 Factor the trinomial completely by using any method. Remember to look for a common factor first. 4p2 + 3p - 5 Flag question 6/9 12/31/2017 Graded Exam #1 Select one: a. (4p + 3)(p + 5) b. p(4p c. (4p + 3) - 5 + 5)(p + 3) d. Prime The correct answer is: Prime Question 15 Factor the polynomial by grouping (if possible). Correct 3rs - 5cr - 15cs + 25c2 6.25 points out of 6.25 Flag question Select one: a. c(3s - 5c)(r - 5) b. r(3s - 5c) - 5(3cs - 5c2) c. (3s - 5c)(r - 5c) d. Cannot be factored The correct answer is: (3s - 5c)(r - 5c) Question 16 Factor completely. Correct 27u6 - 8v6 6.25 points out of 6.25 Select one: Flag question a. (3u2 - 2v2)(9u4 + 6u2v2 + 4v4) b. (3u2 + 2v2)(9u4 + 6u2v2 + 4v4) c. (3u2 + 2v2)(9u4 - 6u2v2 + 4v4) d. Prime The correct answer is: (3u2 - 2v2)(9u4 + 6u2v2 + 4v4) Question 17 Write the domain of the rational expression in interval notation. Correct 7/9 12/31/2017 Graded Exam #1 6.25 points out of 6.25 Flag question Select one: a. (–∞, –2) b. (–∞, 5) c. (–∞, –2) d. (–∞, ∞) (–2, 2) (2, ∞) (5, ∞) (–2, ∞) The correct answer is: (–∞, ∞) Question 18 Simplify the expression, if possible. Correct 6.25 points out of 6.25 Flag question Select one: a. b. a -8 c. d. The correct answer is: Question 19 Rationalize the denominator. Correct 6.25 points out of 6.25 Flag question 8/9 12/31/2017 Graded Exam #1 Select one: a. b. c. d. Already rationalized. The correct answer is: Question 20 Simplify the rational expression. Correct 6.25 points out of 6.25 Flag question Select one: a. (Provided y ≠ 4) b. (Provided y ≠ -4) c. (Provided y ≠ -4) d. ; cannot be simplified The correct answer is: (Provided y ≠ 4) 9/9 ...
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