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College Algebra MATH 107 Spring, 2016, V4.7 Page 1 of 11 MATH 107 FINAL EXAMINATION This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Record your answers and work on the separate answer sheet provided. There are 30 problems. Problems #1–12 are Multiple Choice. Problems #13–21 are Short Answer. (Work not required to be shown) Problems #22–30 are Short Answer with work required to be shown. MULTIPLE CHOICE 1. Determine the domain and range of the piecewise function. 1. ______ A. Domain [–1, 3]; Range [–3, 1] B. Domain [–1, 1]; Range [–1, 3] C. Domain [–1/2, 0]; Range [–1, 0] D. Domain [–3, 1]; Range [–1, 3] 2. Solve: 17 3x x+ = − 2. ______ A. No solution B. −1 C. −7 D. −1, 8 2 4 -4 -2 -4 2 4 -2 College Algebra MATH 107 Spring, 2016, V4.7 Page 2 of 11 3. Determine the interval(s) on which the function is increasing. 3. ______ A. (–2, 4) B. (–∞, –2) and (4, ∞) C. (–3.6, 0) and (6.7, ∞) D. (–3, 1) 4. Determine whether the graph of 7y x −= is symmetric with respect to the origin, the x-axis, or the y-axis. 4. ______ A. not symmetric with respect to the x-axis, not symmetric with respect to the y-axis, and not symmetric with respect to the origin B. symmetric with respect to the x-axis only C. symmetric with respect to the y-axis only D. symmetric with respect to the origin only 5. Solve, and express the answer in interval notation: | 6 – 5x | ≤ 14. 5. ______ A. [–8/5, 4] B. (–∞, −8/5] ∪ [4, ∞) C. (–∞, –8/5] D. [4, ∞) College Algebra MATH 107 Spring, 2016, V4.7 Page 3 of 11 6. Which of the following represents the graph of 8x + 3y = 24 ? 6. ______ A. B. C. D. College Algebra MATH 107 Spring, 2016, V4.7 Page 4 of 11 7. Write a slope-intercept equation for a line parallel to the line x – 7y = 2 which passes through the point (14, –9). 7. ______ A. 1 7 7 y x= − − B. 7 89y x= − + C. 1 9 7 y x= − D. 1 11 7 y x= − 8. Which of the following best describes the graph? 8. ______ A. It is the graph of a function and it is one-to-one. B. It is the graph of a function and it is not one-to-one. C. It is not the graph of a function and it is one-to-one. D. It is not the graph of a function and it is not one-to-one. College Algebra MATH 107 Spring, 2016, V4.7 Page 5 of 11 9. Express as a single logarithm: 5 log y – log (x + 1) + log 1 9. ______ A. log(5 ) log( 1) y x + B. ( )log 5 y x− C. 5 log 1 y x + D. 5 ...

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College Algebra MATH 107 Spring, 2016, V4.7 Page 1 of 11 MATH 107 FINAL EXAMINATION This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Record your answers and work on the separate answer sheet provided. There are 30 problems. Problems #1–12 are Multiple Choice. Problems #13–21 are Short Answer. (Work not required to be shown) Problems #22–30 are Short Answer with work required to be shown. MULTIPLE CHOICE 1. Determine the domain and range of the piecewise function. 1. ______ A. Domain [–1, 3]; Range [–3, 1] B. Domain [–1, 1]; Range [–1, 3] C. Domain [–1/2, 0]; Range [–1, 0] D. Domain [–3, 1]; Range [–1, 3] 2. Solve: 17 3x x+ = − 2. ______ A. No solution B. −1 C. −7 D. −1, 8 2 4 -4 -2 -4 2 4 -2 College Algebra MATH 107 Spring, 2016, V4.7 Page 2 of 11 3. Determine the interval(s) on which the function is increasing. 3. ______ A. (–2, 4) B. (–∞, –2) and (4, ∞) C. (–3.6, 0) and (6.7, ∞) D. (–3, 1) 4. Determine whether the graph of 7y x −= is symmetric with respect to the origin, the x-axis, or the y-axis. 4. ______ A. not symmetric with respect to the x-axis, not symmetric with respect to the y-axis, and not symmetric with respect to the origin B. symmetric with respect to the x-axis only C. symmetric with respect to the y-axis only D. symmetric with respect to the origin only 5. Solve, and express the answer in interval notation: | 6 – 5x | ≤ 14. 5. ______ A. [–8/5, 4] B. (–∞, −8/5] ∪ [4, ∞) C. (–∞, –8/5] D. [4, ∞) College Algebra MATH 107 Spring, 2016, V4.7 Page 3 of 11 6. Which of the following represents the graph of 8x + 3y = 24 ? 6. ______ A. B. C. D. College Algebra MATH 107 Spring, 2016, V4.7 Page 4 of 11 7. Write a slope-intercept equation for a line parallel to the line x – 7y = 2 which passes through the point (14, –9). 7. ______ A. 1 7 7 y x= − − B. 7 89y x= − + C. 1 9 7 y x= − D. 1 11 7 y x= − 8. Which of the following best describes the graph? 8. ______ A. It is the graph of a function and it is one-to-one. B. It is the graph of a function and it is not one-to-one. C. It is not the graph of a function and it is one-to-one. D. It is not the graph of a function and it is not one-to-one. College Algebra MATH 107 Spring, 2016, V4.7 Page 5 of 11 9. Express as a single logarithm: 5 log y – log (x + 1) + log 1 9. ______ A. log(5 ) log( 1) y x + B. ( )log 5 y x− C. 5 log 1 y x + D. 5 ...

- 1. College Algebra MATH 107 Spring, 2016, V4.7 Page 1 of 11 MATH 107 FINAL EXAMINATION This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Record your answers and work on the separate answer sheet provided. There are 30 problems. Problems #1–12 are Multiple Choice. Problems #13–21 are Short Answer. (Work not required to be shown) Problems #22–30 are Short Answer with work required to be shown. MULTIPLE CHOICE 1. Determine the domain and range of the piecewise function. 1. ______
- 2. A. Domain [–1, 3]; Range [–3, 1] B. Domain [–1, 1]; Range [–1, 3] C. Domain [–1/2, 0]; Range [–1, 0] D. Domain [–3, 1]; Range [–1, 3] 2. Solve: 17 3x x+ = − 2. ______ A. No solution B. −1 C. −7 D. −1, 8 2 4 -4 -2 -4
- 3. 2 4 -2 College Algebra MATH 107 Spring, 2016, V4.7 Page 2 of 11 3. Determine the interval(s) on which the function is increasing. 3. ______ A. (–2, 4) B. (–∞, –2) and (4, ∞) C. (–3.6, 0) and (6.7, ∞) D. (–3, 1)
- 4. 4. Determine whether the graph of 7y x −= is symmetric with respect to the origin, the x-axis, or the y-axis. 4. ______ A. not symmetric with respect to the x-axis, not symmetric with respect to the y-axis, and not symmetric with respect to the origin B. symmetric with respect to the x-axis only C. symmetric with respect to the y-axis only D. symmetric with respect to the origin only 5. Solve, and express the answer in interval notation: | 6 – 5x | ≤ 14. 5. ______ A. [–8/5, 4] B. (–∞, −8/5] ∪ [4, ∞) C. (–∞, –8/5] D. [4, ∞) College Algebra MATH 107 Spring, 2016, V4.7
- 5. Page 3 of 11 6. Which of the following represents the graph of 8x + 3y = 24 ? 6. ______ A. B. C. D. College Algebra MATH 107 Spring, 2016, V4.7 Page 4 of 11 7. Write a slope-intercept equation for a line parallel to the line x – 7y = 2 which passes through the point (14, –9). 7. ______ A. 1 7 7
- 6. y x= − − B. 7 89y x= − + C. 1 9 7 y x= − D. 1 11 7 y x= − 8. Which of the following best describes the graph? 8. ______ A. It is the graph of a function and it is one-to-one.
- 7. B. It is the graph of a function and it is not one-to-one. C. It is not the graph of a function and it is one-to-one. D. It is not the graph of a function and it is not one-to-one. College Algebra MATH 107 Spring, 2016, V4.7 Page 5 of 11 9. Express as a single logarithm: 5 log y – log (x + 1) + log 1 9. ______ A. log(5 ) log( 1) y x + B. ( )log 5 y x− C. 5 log 1
- 8. y x D. 5 1 log 1 y x 10. Which of the functions corresponds to the graph? 10. ______ A. ( ) 2 xf x e=
- 9. B. ( ) 1 xf x e= + C. ( ) 2 xf x e= + D. ( ) 2 xf x e= College Algebra MATH 107 Spring, 2016, V4.7 Page 6 of 11 11. Suppose that for a function f , the equation f (x) = 0 has exactly three real-number solutions. Which of the following statements MUST be true? 11. ______ A. f is a cubic polynomial function. B. f has exactly three x-intercepts. C. f has exactly three y-intercepts. D. f is an invertible function. 12. The graph of y = f (x) is shown at the left and the graph of y = g(x) is shown at the right. (No
- 10. formulas are given.) What is the relationship between g(x) and f (x)? 12. ______ y = f (x) y = g(x) A. g(x) = f (x + 2) – 1 B. g(x) = f (x – 2) + 2 C. g(x) = f (x – 1) – 2 D. g(x) = f (x + 1) – 2 2 4 -2 -4 -2 -4 2
- 11. 4 y = f(x) 2 4 -2 -4 -2 -4 2 4 College Algebra MATH 107 Spring, 2016, V4.7 Page 7 of 11 SHORT ANSWER: 13. Multiply and simplify: (6 + 5i)(9 + i). Write the answer in the form a + bi, where a and b are real numbers. Answer: ________ 14. Solve, and write the answer in interval notation: 9 0 3 x
- 12. x + ≤ − . Answer: ________ 15. A bowl of soup at 165° F. is placed in a room of constant temperature of 75° F. The temperature T of the soup t minutes after it is placed in the room is given by T(t) = 75 + 90 e – 0.075 t Find the temperature of the soup 20 minutes after it is placed in the room. (Round to the nearest degree.) Answer: ________ 16. Find the value of the logarithm: 4 1 log 16
- 13. . Answer: ________ 17. Solve: 5 87 49x + = . Answer: ________ 18. Suppose $4,400 is invested in an account at an annual interest rate of 3.4% compounded continuously. How long (to the nearest tenth of a year) will it take the investment to double in size? Answer: ________ 19. Let f (x) = x 2 −−−− 2x −−−− 5. (a) Find the vertex. Answer: ________ (b) State the range of the function. Answer: ________ (c) On what interval is the function decreasing? Answer: ________ College Algebra MATH 107 Spring, 2016, V4.7
- 14. Page 8 of 11 20. Consider the polynomial P(x), shown in both standard form and factored form. 4 3 21 1 7 41 1 ( ) 3 ( 3)( 1)( 2)( 5) 10 2 10 10 10 P x x x x x x x x x= + − − − = − + + + (a) Which sketch illustrates the end behavior of the polynomial function? Answer: ________ (b) State the y-intercept. Answer: ________________ (c) State the zeros of the function. Answer: ________________ (d) State which graph below is the graph of P(x). Answer: ________ GRAPH A GRAPH B GRAPH C GRAPH D
- 15. A. B. C. D. vvvv vvvv vvvv vvvv College Algebra MATH 107 Spring, 2016, V4.7 Page 9 of 11 21. Let 4 )( 2 − = x x xf . (a) State the domain. Answer: _________________
- 16. (b) State the horizontal asymptote. Answer: _________________ (c) State the vertical asymptote(s). Answer: _________________ (d) Which of the following represents the graph of 4 )( 2 − = x x xf ? Answer: ______________ GRAPH A. GRAPH B. GRAPH C. GRAPH D. College Algebra MATH 107 Spring, 2016, V4.7
- 17. Page 10 of 11 SHORT ANSWER, with work required to be shown, as indicated. 22. Let f (x) = x + 2 and xxg −= 6)( . g f . Show work. (b) Find the domain of the quotient function g f . Explain. 23. Points (7, – 6) and (9, 2) are endpoints of the diameter of a circle. (a) What is the length of the diameter? Give the exact answer,
- 18. simplified as much as possible. Show work. (b) What is the center point C of the circle? (c) Given the point C you found in part (b), state the point symmetric to C about the y-axis. 24. Find the equation for a line which passes through the points (6, 8) and (2, – 4). Write the equation in slope-intercept form. Show work. 25. A salesperson earns a base salary of $2,100 per month and a commission of 5.8% on the amount of sales made. If the salesperson has a paycheck of $4,037.20 for one month, what was the amount of sales for the month? Show work. 26. Let f (x) = 5x 2 – 4 and g(x) = x – 3. (a) Find the composite function ))(( xgf o and simplify. Show work. (b) Find ( ) ( 1)f g −o . Show work.
- 19. 27. Find the exact solutions and simplify as much as possible: 3x 2 + 2 = 8x. Show work. 28. Given the function 1 ( ) 6 5 f x x= − , find a formula for the inverse function. Show work. College Algebra MATH 107 Spring, 2016, V4.7 Page 11 of 11 29. Donut Delights, Inc. has determined that when x donuts are made daily, the profit P, in dollars, is given by P(x) = –0.002 x 2 + 4.7x – 1350 (a) What is the company’s profit if 800 donuts are made daily?
- 20. (b) How many donuts should be made daily in order to maximize the company’s profit? Show work. 30. Solve: 2 10 42 0 7 49 x x x − + = − − . Show work. Math 107 Final ExaminationSpring, 20162 Math 107 College
- 21. AlgebraName______________________________ Final Examination: Spring, 2016Instructor __________________________ Answer Sheet Instructions: This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. Record your answers and work in this document. There are 30 problems. Problems #1-12 are multiple choice. Record your choice for each problem. Problems #13-21 are short answer. Record your answer for each problem. Problems #22-30 are short answer with work required. When requested, show all work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand- write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Your exam will receive a zero grade unless you complete the following honor statement. Please sign (or type) your name below the following honor statement: I have completed this final examination myself, working independently and not consulting anyone except the instructor. I have neither given nor received help on this final examination. Name _____________________Date___________________
- 22. MULTIPLE CHOICE. Record your answer choices. 1.7. 2.8. 3.9. 4.10. 5.11. 6.12. SHORT ANSWER. Record your answers below. 13. 14. 15. 16. 17. 18. 19. (a) (b) (c) 20. (a) (b) (c) (d) 21. (a)
- 23. (b) (c) (d) SHORT ANSWER with Work Shown. Record your answers and work. Problem Number Solution 22 Answers: (a) (b) Work/for part (a) and explanation for part (b):
- 26. Work: 26 Answers: (a) (b) Work for part (a) and for part (b):
- 27. 27 Answer: Work:
- 28. 28 Answer: Work:
- 30. 30 Answer: Work: