Midterm Review Answers:

1. 37

2.  28/3

3. 7a+5

4. -18y^2

5.  x-4

6. a. 3+6x  b.  3x-5  c.  4(x-2)

7. -3

8. 1

9. 1/10

10. -1/6

11. -10

12.s=20

13.b=9

14.g=25

15.r=-48

16.z=11/2

17.k=-9

18.r=-5

19. 46.8

20. 1.25

21. .0265

22. 125%

23. $4,250

24. 8.4 hours

25. 6.75

26. (-1,0)

27. (3,5)

28. (5,-2)

29. (-4,3)

30. III

31. 0

32. (0,4)

33. -5/7

34. -1/2; falls

35. 1/3

36.y=-5x+10

37. answers can vary an example is y=-2x+1; but that 1 can be any number.

38.answers can vary an example is y=3x+1; but that 1 can be any number.

39. m=-5, y intercept: (0,3)

40. vertical

41.  f(2)=-2

Part 2

1.  y=2

2.  y=-3x+5, f(-2)=11, f(-1)=8, f(0)=5, f(1)=2

3.  a.  r=d/t

    b.  500, 400, 333 1/3 hours

4.a)  x+7=9; x=2

   b)255+65=x; x=$320

5.a) $21,000

    b)$371,000

6.  You should have graphed y=2 as a horizontal line and x=-1 as a vertical line.

7.    omit

8.  x intercept (1,0)

     y intercept (0,-2)

then graph

9.  a.y=-5/7x+5

    b.  answers will vary...make an input output table.

    c.  graph (note your graph should pass through (0,5) and should be falling.