**Unformatted text preview: **12/31/2017 Graded Exam #2 Started on Sunday, December 31, 2017, 3:36 AM
State Finished Completed on Sunday, December 31, 2017, 5:00 AM
Time taken 1 hour 24 mins
Grade 87.50 out of 125.00 (70%) Question 1 Solve the rational equation. Correct
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of 6.25 = - Flag
question Select one:
a. {5, 1} b. {-5, -1} c. {-8, 8} d. {5} The correct answer is: {5, Question 2 1} Solve for the indicated variable. Incorrect
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question Q= DP for D Select one:
a. D = b. D = c. D = d. D = The correct answer is: D = 1/9 12/31/2017 Graded Exam #2 Question 3 Solve the problem. Correct A train ride is $2.85 per ride. A commuter can purchase an unlimited-ride card for
$45 per month. How many rides are required for a commuter to save money by
buying the card? 6.25 points out
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question Select one:
a. 20 rides b. 18 rides c. 16 rides d. 22 rides The correct answer is: 16 rides Question 4 Solve the problem. Correct The plans for a rectangular deck call for the width to be 4 feet less than the length.
Sam wants the deck to have an overall perimeter of 52 feet. What should the
length of the deck be? 6.25 points out
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question Select one:
a. 4 feet b. 19 feet c. 15 feet d. 28 feet The correct answer is: 15 Question 5
Correct
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question feet Solve the problem.
A consultant traveled 255 miles to attend a meeting, traveling
hours for
the first part of the trip, then increasing to a speed of
for the second part.
If the entire trip took 5hours, how far did the consultant travel at the faster speed?
Select one:
a. 127.5 mi b. 135 mi c. 180 mi d. 120 mi 2/9 12/31/2017 Graded Exam #2 The correct answer is: 120 Question 6
Incorrect mi Solve the problem. 0.00 points out
of 6.25 The property tax on a $160,000.00 house is $2,400.00. At this rate, what is the
property tax on a house that is $280,000.00? Flag
question Select one:
a. $4,200.00
b. $5,040.00
c. $4,620.00
d. $3,780.00 The correct answer is: $4,200.00 Question 7 Simplify the expression in terms of i: Correct
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question Select one:
a. 7i
b. 49i
c. -7i
d. i The correct answer is: 7i Question 8 Simplify and write the result in standard form, a + bi. Correct
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question Select one:
a. 7 +i b. 7 - 2i 3/9 12/31/2017 Graded Exam #2 c. 7 -i d. 7 + 2i The correct answer is: 7 Question 9 -i Simplify the expression. Correct
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question Select one:
a. - b. - c. i d. The correct answer is: i Question 10 Solve for the indicated variable.
Correct
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question at2 + uy = h for t
Select one:
a. t = b. t =± c. t = or t = 4/9 12/31/2017 Graded Exam #2 d. t =± The correct answer is: t =± Question 11 Find the value of n so that the expression is a perfect square trinomial and
Correct
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question then factor the trinomial. Find the value of n so that the expression is a perfect square trinomial and then
factor the trinomial.
t2 - t+n Select one:
a. n = ; 2 b. n = ; 2 c. n = ; d. n = 2 2 ; The correct answer is: n = ; 2 Question 12 Solve the quadratic equation by completing the square and applying the
Incorrect square root property. 0.00 points out
of 6.25 -5v2 = 5 + 7v Flag
question Select one:
a. 5/9 12/31/2017 Graded Exam #2 b. c. d. The correct answer is: Question 13 Solve the problem.
Correct
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question The sum of an integer and its square is 30. Find the integers.
Select one:
a. 5 and -6 b. -6 and 36 c. 25 and 36 d. 5 and 25 The correct answer is: 5 and -6 Question 14 Solve the problem.
Incorrect
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question The gas mileage for a certain vehicle can be approximated by
where x is the speed of the vehicle in mph. Determine
the speed(s) at which the car gets 9 mpg. Round to the nearest mph.
Select one:
a. 27 mph and 43 mph b. 23 mph and 47 mph c. 35 mph d. 19 mph and 51 mph The correct answer is: 27 mph and 43 mph 6/9 12/31/2017 Graded Exam #2 Question 15 Solve the equation.
Correct
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question 5- = Select one:
a. {12, -18} b. {6, -18} c. {6, -9} d. {12, -9} The correct answer is: {6, -9} Question 16 Make an appropriate substitution and solve the equation.
Correct
6.25 points out
of 6.25 - + +1=0 Flag
question Select one:
a.
b. {3 + c. {-3 + ,3- } , -3 - } d. The correct answer is: {-3 + , -3 - } Question 17 Solve the equation.
Correct
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question 9 + 24u-2 = 58u-1
Select one:
a. 7/9 12/31/2017 Graded Exam #2 b. c. d. The correct answer is: Question 18 Write an absolute value inequality equivalent to the expression.
Correct
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question "All real numbers whose distance from 13 is at most 5"
Select one:
a. >5 b. ≤5 c. <5 d. ≤ 13 The correct answer is: ≤5 Question 19 Solve the compound inequality. Write the answer in interval notation.
Incorrect
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question 23 < 3x or -8 + 2x ≤ -15
Select one:
a.
b. (-∞, ∞) c. d. 8/9 12/31/2017 Graded Exam #2 The correct answer is: Question 20 Solve the absolute value inequality. Write the solution in interval notation.
Incorrect
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question 24 ≤ 2 +
Select one:
a. {-22, 22} b.
c. { } d. The correct answer is: 9/9 ...

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