Waka

MULTIPLE CHOICE. Record your answer choices.

1. C 7. D

2. B 8. A

3. A 9. D

4. C 10. B

5. D 11. A

6. B 12. A

SHORT ANSWER. Record your answers below.

13. 22-53i

14. (-infinity,-9)U[4,infinity)

15. 95

16.-3

17. x=10/3

18.11.4 years

19. (a) (2,6)

(b) (2,infinity)

(c) (2,infinity)

20. (a) C

(b) (0,2)

(c) -3,-1,1,2

(d) Graph B

21. (a) (-infinity,-3)U(-3,3)U(3,infinity)

(b) x=-3,3

(c) y=5

(d) Graph B

SHORT ANSWER with Work Shown. Record your answers and work.

Problem Number | Solution |

22 | Answer: -32a^52Work:-32 a^40 b^15 a^5 b^-15 a^7-32a^40 a^5 a^7-32a^52 |

23 | Answers:(a) 2sqrt(17)(b) (3,-3)(c) (x-3)^2 + (y+3)^2=68Work for part (a): =sqrt((2-4)^2 + (1-(-7))^2) =sqrt((-2)^2 + 8^2) =sqrt(68) =2sqrt(17) |

24 | Answer: y = -3x -1Work: slope=(8-2)/(-3-(-1))=-3y-2=-3(x-(-1))y-2=-3x-3y=-3x-1 |

25 | Answer: $78,000Work: .016(x)+50=$1,298 .016x=1248 x=$1,248/.016 x=$78,000 |

26 | Answers:(a) 5x^2 - 10x + 12(b) 5x^2+6Work for part (a) 5(x-1)^2+7 5(x-1)(x-1)+7 5(x^2-2x+1)+7 5x^2-10x+5+7 5x^2-10x+12and for part (b): (5x^2+7)-1 5x^2+6 |

27 | Answer: x=(10+2i)/4, (10-2i)/4Work: 2x^2-10x+13Using quadratic formula a=2, b=-10, c=13X= (10(+-)2i)/2(2)X =(10(+-)2i)/4 |

28 | Answer: f^-1(x)= 4x-36Work: x = 1/4y+9 x-9=1/4y 4x-36=y |

29 | Answers:(a) $800(b) 1450 doughnutsWork for (b): x= -b/2a a=-0.001 b=2.9 x=-2.9/2(-0.001) x=1450 |

30 | Answer: x=3Work: (x+11/x+7)+56/(x-7)(x+7)=0 (x+11/x+7)*(x-7)(x+7)+(56/(x-7)(x+7))*(x-7)(x+7)=0*(x-7)(x+)...