BOTH CLASSES: You have a test tomorrow. In this post is listed the pages and problem numbers. The answers are given in posts below. Don't forget, you MUST come tomorrow morning with your answers checked and corrected. Please email me if you have any questions, or you think that I made a mistake.
Pre-Algebra: Pg. 56 #1 - 39 odd
Algebra: Pg. 162 - 163 #9 - 14, 16, 18. The worksheet we did in class is not required, but I did also give the answers to those questions below.
Wednesday, September 26, 2012
Algebra Book HW Answers 9/26
9. All Real numbers
10. x = -12
11. x = 58 / 7, or x = 8.285714... with all digits repeating
12. x = -9
13. x = 73 / 19, or x = 3.842105263157894736... with all 18 of those digits repeating. If you're going to use a decimal, you have to carry it out all the way until it ends or repeats.
14. x = 25 / 81, or x = 0.308641975... repeating (I think). Decimals recommended for entertainment purposes only.
16. x = 19 - 4y
18a. x = hours for assistant; x - 2 = hours for master
18b. 50x = bricks for assistant; 80(x - 2) = bricks for master
18c. Assistant has worked 5 1/3 hours ("five and one third"), master has worked 3 1/3 hours.
18d. No. It will take 8.92 hours to lay 1000 bricks, or you could say that after 8 hours they will have laid 880 bricks.
10. x = -12
11. x = 58 / 7, or x = 8.285714... with all digits repeating
12. x = -9
13. x = 73 / 19, or x = 3.842105263157894736... with all 18 of those digits repeating. If you're going to use a decimal, you have to carry it out all the way until it ends or repeats.
14. x = 25 / 81, or x = 0.308641975... repeating (I think). Decimals recommended for entertainment purposes only.
16. x = 19 - 4y
18a. x = hours for assistant; x - 2 = hours for master
18b. 50x = bricks for assistant; 80(x - 2) = bricks for master
18c. Assistant has worked 5 1/3 hours ("five and one third"), master has worked 3 1/3 hours.
18d. No. It will take 8.92 hours to lay 1000 bricks, or you could say that after 8 hours they will have laid 880 bricks.
Algebra Worksheet Answers 9/26
(Not required, but here they are if you want them)
1. x = 10
2. d = -4/3 or -1.333333...
3. w = -9
4. e can be any Real number
5. c = 23/6 or 3.83333333...
6. y = 0
7. No solution for f
8. b = -0.7 or -7/10
9. a = 1.3 or 13/10
10. z = -3
11. g = (h + 13)/2 or g = h/2 + 6.5
12. u = 9p^2 / 170 ("9 p squared over 170"), or 0.9p^2 / 17
13. i = 7W / (12j) (I substituted the "W" for the psi)
14. B = (v - 2r - 4) / 3 (obviously I switched "B" for beta)
15a. 70 ft/s; then 121.2 ft/s
15b. 6 + 32t (which is NOT 38t)
15c. 3 seconds; then 7.75 seconds
16a. Ludwig: 475 - 14n; Wolfgang: 56 + 2n
16b. 26.1875 days, or 26 days, 4 hours, and 30 minutes
17a. Cold: 9.5m; Hot: 8.4(m - 3)
17b. Never. If you solve the equation, you should get m = -22.90909090... and if you think about it, you're turning on the faster faucet first, so the slow one will never catch up.
17c. approximately 5.60 minutes after the Cold goes on.
1. x = 10
2. d = -4/3 or -1.333333...
3. w = -9
4. e can be any Real number
5. c = 23/6 or 3.83333333...
6. y = 0
7. No solution for f
8. b = -0.7 or -7/10
9. a = 1.3 or 13/10
10. z = -3
11. g = (h + 13)/2 or g = h/2 + 6.5
12. u = 9p^2 / 170 ("9 p squared over 170"), or 0.9p^2 / 17
13. i = 7W / (12j) (I substituted the "W" for the psi)
14. B = (v - 2r - 4) / 3 (obviously I switched "B" for beta)
15a. 70 ft/s; then 121.2 ft/s
15b. 6 + 32t (which is NOT 38t)
15c. 3 seconds; then 7.75 seconds
16a. Ludwig: 475 - 14n; Wolfgang: 56 + 2n
16b. 26.1875 days, or 26 days, 4 hours, and 30 minutes
17a. Cold: 9.5m; Hot: 8.4(m - 3)
17b. Never. If you solve the equation, you should get m = -22.90909090... and if you think about it, you're turning on the faster faucet first, so the slow one will never catch up.
17c. approximately 5.60 minutes after the Cold goes on.
Pre-Algebra Answers 9/26
1. 25
3. 4
5. 8 * 8 = 64
7. 0.2 * 0.2 * 0.2 * 0.2 * 0.2 = 0.00032
9. 50 * 50 * 50 = 125,000 cubic cm (we haven't talked about volume yet)
11. 3
13. 23
15. 19
17. 2
19. 121 & -121
21. 19 & -19
23. -68
25. 21
27. -67
29. 24
31. -19
33. -35
35. -20
37. 15
39. You should see on your graph that all the points lie in a straight line, and be in Quadrants III & IV and one on the y-axis.
3. 4
5. 8 * 8 = 64
7. 0.2 * 0.2 * 0.2 * 0.2 * 0.2 = 0.00032
9. 50 * 50 * 50 = 125,000 cubic cm (we haven't talked about volume yet)
11. 3
13. 23
15. 19
17. 2
19. 121 & -121
21. 19 & -19
23. -68
25. 21
27. -67
29. 24
31. -19
33. -35
35. -20
37. 15
39. You should see on your graph that all the points lie in a straight line, and be in Quadrants III & IV and one on the y-axis.
Homework Tuesday, 9/25
Pre-Algebra: Pg. 52 - 55 #9 - 16, 26 - 30, 31 - 47 odd, 48 - 56 even, 57 - 64
Algebra: Pg. 148 - 149 #19, 20, 27 - 31; pg. 154 -155 #11
Algebra: Pg. 148 - 149 #19, 20, 27 - 31; pg. 154 -155 #11
Monday, September 24, 2012
Homework Monday, 9/24
Pre-Algebra: Pg. 45 - 46 #12 - 19, 27 - 36, 43
Algebra: Pg. 154 and beyond #3, 6, 10, 13
Thursday, September 20, 2012
Homework Thursday, 9/20
Pre-Algebra: Pg. 36 - 38 #24 - 31, 35 - 46, 49
Algebra: Pg. 148 - 149 #9 - 18, 21 - 23, 32
Algebra: Pg. 148 - 149 #9 - 18, 21 - 23, 32
Wednesday, September 19, 2012
Homework Wednesday, 9/19
Pre-Algebra: Pg. 32 - 33 #27 - 38, 41, 46 - 53
Algebra: Pg. 101 #20 - 44 Evens
Algebra: Pg. 101 #20 - 44 Evens
Monday, September 10, 2012
Homework Monday, 9/10
Pre-Algebra: Pg. 7 - 9 #12 - 30 divisible by 3, #32 - 37 all, then choose either #51 or 52.
Algebra: I gave you a worksheet that says it's page 22. In the first set, do all #1 - 6, then just do the odds in the second set. Yeah, this one may take a little while.
Algebra: I gave you a worksheet that says it's page 22. In the first set, do all #1 - 6, then just do the odds in the second set. Yeah, this one may take a little while.
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