**Unformatted text preview: **12/31/2017 Graded Exam #1 Started on
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Feedback Sunday, December 31, 2017, 1:46 AM
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Sunday, December 31, 2017, 3:16 AM
1 hour 30 mins
112.50 out of 125.00 (90%)
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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
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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
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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
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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
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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
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Flag question Select one:
a.
b. a -8 c. d. The correct answer is: Question 19 Rationalize the denominator. Correct
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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
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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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