Math126 Week 3 Quiz

Date Taken: 3/7/2013 Time Spent: 2 h , 11 min , 30 secs Points Received: 20 / 20 (100%) Question Type: # Of Questions: # Correct: Multiple Choice 20 20 Grade Details – All Questions 1. Question : The difference between the ages of two friends is 37 years. The sum of their ages is 55 years. Find the age of the older friend. Student Answer: 46 9 47 45 Instructor Explanation: See section 8. 2 of the textbook. Points Received: 1 of 1 Comments: 2. Question : Which of the following is not a way to name the angle shown? Student Answer: Instructor Explanation: See section 10. 1 of the textbook. Points Received: 1 of 1

Comments: 3. Question : The triangles in the figure below are similar. Use the proportional property of similar triangles to find the measure of x. Student Answer: 34. 2 km 29. 2 km 25. 2 km 19. 2 km Instructor Explanation: See section 10. 2 of the textbook. Points Received: 1 of 1 Comments: 4. Question : Determine whether or not the network is traversable. Student Answer: No, it is not traversable. Yes, it is traversable. Instructor Explanation: See section 10. 7 of the textbook. Points Received: 1 of 1 Comments: 5. Question : Find the slope of the line passing through the points (0, -4) and (-6, 7).

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Student Answer: 11/6 -11/6 -6/11 6/11 Instructor Explanation: See section 8. 1 of the textbook. Points Received: 1 of 1 Comments: 6. Question : Identify angles 2 and 7 as alternate interior, alternate exterior, corresponding, or vertical. Student Answer: Alternate exterior Vertical Alternate interior Corresponding Instructor Explanation: See section 10. 1 of the textbook. Points Received: 1 of 1 Comments: 7. Question : Classify the triangle according to sides. Student Answer: Scalene Isosceles Equilateral Instructor Explanation: See section 10. 2 of the textbook. Points Received: 1 of 1 Comments: 8.

Question : Find the vertex of the parabola. y = -2×2 + 12x – 13 Student Answer: (5, -3) (-3, 5) (3, 5) (5, 3) Instructor Explanation: See section 8. 5 of the textbook. Points Received: 1 of 1 Comments: 9. Question : What is the definition of sin A for the following triangle? Student Answer: Instructor Explanation: See section 10. 6 of the textbook. Points Received: 1 of 1 Comments: 10. Question : A tent is shaped like a pyramid. It has a square base measuring 8 feet on a side and a height of 6 feet. What is the volume of the tent? Student Answer: 512 ft3 128 ft3 16 ft3 32 ft3 Instructor Explanation: See section 10. of the textbook. Points Received: 1 of 1 Comments: 11. Question : Find the measure of the supplement of 58°. Student Answer: 32° 148° 302° 122° Instructor Explanation: See section 10. 1 of the textbook. Points Received: 1 of 1 Comments: 12. Question : Evaluate the function f(x) = -x2 + 5 for x = 4. Student Answer: -9 -10 -12 -11 Instructor Explanation: See section 8. 5 of the textbook. Points Received: 1 of 1 Comments: 13. Question : The difference between the ages of two friends is 2 years. The sum of their ages is 74 years. Find the age of the older friend. Student Answer: 38 36 39 37

Instructor Explanation: See section 8. 2 of the textbook. Points Received: 1 of 1 Comments: 14. Question : Find the slope of the line passing through the points (-3, -10) and (4, 5). Student Answer: -15/7 -7/15 15/7 7/15 Instructor Explanation: See section 8. 1 of the textbook. Points Received: 1 of 1 Comments: 15. Question : Classify the angle as acute, right, obtuse, or straight. Student Answer: Obtuse Right Straight Acute Instructor Explanation: See section 10. 1 of the textbook. Points Received: 1 of 1 Comments: 16. Question : Identify angles 4 and 5 as alternate interior, alternate exterior, corresponding, or vertical.

Student Answer: Corresponding Alternate interior Vertical Alternate exterior Instructor Explanation: See section 10. 1 of the textbook. Points Received: 1 of 1 Comments: 17. Question : Determine whether or not the network is traversable. Student Answer: No, it is not traversable. Yes, it is traversable. Instructor Explanation: See section 10. 7 of the textbook. Points Received: 1 of 1 Comments: 18. Question : Determine whether the system is consistent, inconsistent, or dependent. 3x + 2y = 15 6x + 4y = 30 Student Answer: Consistent Dependent Inconsistent Instructor Explanation: See section 8. of the textbook. Points Received: 1 of 1 Comments: 19. Question : Determine whether or not the relation is a function. {(1, 9), (2, 10), (3, 11), (4, 12)} Student Answer: No Yes Instructor Explanation: See section 8. 5 of the textbook. Points Received: 1 of 1 Comments: 20. Question : Determine whether the system is consistent, inconsistent, or dependent. 3x – 3y = -9 9x – 9y = -27 Student Answer: Consistent Dependent Inconsistant Instructor Explanation: See section 8. 2 of the textbook. Points Received: 1 of 1 Comments: * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)