1. Stanford 9
Here are the answers.
Check the ones you missed and then put the total out of 30 at the top.

2. Stanford 9 1.) t = d/6 + 3 when d = 12 t = 12/6 + 3 t = 2 + 3 = 5
2.) (F) 4x = 1000

3. Stanford 9 3.) 2t < 5 2t/2 < 5/2 t < 5/2 4.) b = 100 + d - w

4. Stanford 9 5.) V = lwh V =3 • 2 • 1 V =7/2 • 5/2 •3/2 V = 105/8
2 1/2
1 1/2
3 1/2

5. Stanford 9
6.) (J)

6. Stanford 9
7.) (C) y = 2x + 5
1 = 2(-2) = 2(-1) = 2(0) = 2(1) = 2(2) + 5
X Y
-2 1
-1 3
0 5
1 7
2 9

7. Stanford 9
8.) 8/2 = 60/x
8x = 120
x = 15 8 2 60 x

8. Stanford 9 9.) A + B + 104 = 180 since A = b, A + A + 104 = 180

9. Stanford 9 10.) Area = r2 . Area = 3.14(22) Area = 3.14(4)B C D

10. Stanford 9
11.) A = L • W
A = 25 • 16
A = 400 25 16

11. Stanford 9 11.) A = ½(L • W) A = ½( 25 • 16) A = 200 400 200 25 200 =- 16
200 /
400 1 / 2 =

12. Standford 9
12.) Y
Midpoint (3,1) X

13. Standford 9
C = 6
13.) Y 6 X

14. Standford 9
14.) Y X
(2, -1)

15. Stanford 9
15.)

16. Stanford 9
16.) Sine for angle N = opposite side hypotenuse Sine for angle N = 20/40 = .5

17. Stanford 9 17.) 2/10 = x/50 10x = 100 x = 10 18.) 1/3 • 1000 = 333
19.) 1/8 • 48 = 6
20.) = 16

18. Stanford 9
21.) 1.) x = 10, y = 11, z = 12
2.) 11 • 144 = 1584
3.) 5 • 12 = 60
4.) 12 • 1 = 12
5.) = 1656

19. Stanford 9
22.) 2 • 3 • 4 • 3 = 72
23.) s = a/(1-r) s = 1/(1-1/2) s = 1/(1/2) = 2
24.) 12 whole squares /4 partial squares = 16

20. Stanford 9 25.) The length of one side of the is 1/2.
So… every two lengths is 1.
Now count around the figures to find the one that is 5 (C).

21. Stanford 9 26.) 2 Alberton and Springfield.
27.) a2 + b2 = c = c2 & = c = c2 & = c = c & 25 = c = c & = c
= 21 & = 15
= 6

22. Stanford 9 28.) Let x = nickels & y = dimes .05x + .1 y = 4 x + y = 50
28.) Continued

23. Stanford 9 28. continued) 5x + 10y = 400 -5x -5y = -250 5y = 150

24. Stanford 9 29.) Sam = 28.7 Tom = 28.7 - 15.3 Will = 28.7 - 15.3 - 7.5
Vern =
Vern = 1.7

25. Stanford 9 30.) (x + 2)(x + 2) = 100 x2 +2x + 2x + 4 = 100
30.) Continued

26. Stanford 9 x can’t be negative 30. continued) x2 +4x -96 = 0