Week 7 and 8 Quiz Answers(1)

Week 7 and 8 Quiz Answers(1) - graph is D 12. exact...

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1. first page is 20, second page is 21 2. B 3. a) x = (7-sqrt(181))/6 , (7+sqrt(181))/6 b) ((7-sqrt(181))/6,0) , ((7+sqrt(181))/6) , 0) 4. vertex is (-3,0) line of symmetry is x = -3 graph is B 5. x-intercepts (2-sqrt(3), 0) and (2+sqrt(3) , 0). If you need to round this one this is (0.3 , 0) and (3.7 , 0) y-intercept is (0,1) 6. x-coord of vertex is 1/2 y-coord of vertex is 9/2 line of symmetry is x= 1/2 The maximum of f(x) is 9/2 9/2 is a maximum graph is B 7. (-3 + sqrt(57))/4 , (-3 - sqrt(57))/4 8. exact solutions are (7 - sqrt(13))/2, (sqrt(13) + 7)/2 approximate solutions are 1.697 , 5.303 9. x^2 - 2x + 1 10. vertex is (-1, -9) line of symmetry is x = -1 the max value is -9 the value is maximum the graph is A 11. vertex is (0,0) line of symmetry is x = 0
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Unformatted text preview: graph is D 12. exact solutions 1+ 3 sqrt(5) , 1 - 3 sqrt(5) approximate solutions -5.708 , 7.708 13. A. (1/2) - (sqrt(19)/2) i , (1/2) + (sqrt(19)/2) i 14. width is 3 ft length is 5 ft 15. C 16. vertex is (1,3) line of symmetry is x = 1 (choice B) the minimum of f(x) = 3 the value is minimum the graph is D 17. B 18. 1, -13 19. a) sqrt(7) , -sqrt(7) b) (sqrt(7) , 0) , (-sqrt(7) , 0) 20. vertex is (-4,6) line of symmetry is x = -4 minimum value is 6 value is a minimum graph is D 21. vertex is (2, -10) line of symmetry is x = 2 minimum is -10 value is a minimum graph is D 22. B. two real solutions 23. maximum area is 800 square feet the dimensions are 40 ft by 20 ft...
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Week 7 and 8 Quiz Answers(1) - graph is D 12. exact...

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