Luttrell 2012
158
Answer Key, chapters 4-6
Sheet 4m:
1. 9
3. 16
5. 50
7. 12
9. 12; 14; 108; 42
11. Quadrilateral
12. Hexagon
13. 105
Sheet 4n:
1. 20.8
2. 2300m; 2,300,000 mm
3. 4.2 classes
4. 90%
5. 25%
Chapter 4 Test: 1. <; <; =
2. 7/3; 2/3
3. 15; 4; 40
4. 9; 25; 5.42
5. 1600; 420
6. $3.20 is cheaper; 326.7 km
7. 28; 10; 150; 64; 39%
8. 247,026
9. 80%
10. 37%
11. A. 234000
11. C. 6,304
11. D. -6
11.E. 8
Bonus Jar I: 350 red, 50 white; Jar II: 360 red, 40 white
Sheet 5a:
1. H = 3V/(
πr
2
)
2. m = (y-b)/x
5. Y
1
= m(x
1
-x
2
) + y
2
7. h= 2A/b
Sheet 5b:
1. S = 2T-5
3. 3R
5. S+T = 50,000
7. x + y
9. H = 4 + y
11. H = ½ L
13. T = 1.25S
15. D = 8
Sheet 5c:
1. x = 5
3. x = 6
5. w > -4
7. z < -6
Sheet 5d:
1. | 6 - 4 | = 2
3. | 7 – (-3)| = 10
5. | x – (-2)| = 4
7. |x – (-2)| < 4
9. 5, 11
11. -8, 4
Sheet 5e:
1. 2
3. -4, 4
5. x < 3
7. -
3 ≤ x ≤ 3
9. -2, 8
11. -1, 11
12. -1, 5
Sheet 5f:
1. -1< x < 5
3. -8 < x < -6
5. x < -4 or x > 6 7. -
2≤ x ≤ 6 9. x > 1 or x < -1/2
10. 0 < y < 4
14. 9 ≤ x ≤ 15 15. -5 ≤ x ≤ -1
Sheet 5g:
4. The figure is a line.
Sheet 5h:
1, 6, 4, 2, 7, 8, 5, 3
9. y = kx
11. y = k/x
12. y = k
15. y = kx + b
Sheet 5i:
1. Yes, Domain: -
1 ≤ x ≤ 4; Range: -5 ≤ y ≤ 6
2. Yes
3. No
4. Yes
5. Yes
6. Yes
7. Yes
8. No
9. No
Chapter 5 Test: 1. 7.5; 8; 6
2. T = 180B + 14000; 16,340
3. h = 2A/b; h = V/(πr
2
)
4. y < -3…
5. -2 < x < 8; -
7 ≤ x ≤ 5; 2, -⅔
Sheet 6a:
Fill in blanks: 3, 6, 1, 3, 6, 4
1. x = {-1, 0}, y = {4, -2.5}
2. x = {7, 14}, y = {3, 9, 15}
3. x = {6, 10}, y = {7.96, 23.88}
Sheet 6b:
Graphs are not included.
Sheet 6c:
1. y = ⅔x – 7
2. y = 3x – 2
3. y = -
⅓x + 2
4. y = -x + 3
5. y = -2x + 5
6. y = 2
7. -4x + 9y = 51
Sheet 6d:
1. y = -3x + 2
2. y = ⅔x + 2⅓
4. y = x + 5
6. y = -2x + 5
7. y = 4x – 11
8. y = -3
Graphs are not included (#9-#17)
9. x = 6
10. x = 6
11. x = -3
12. y = 4
Sheet 6e:
1. A & C
2. y = ⅓x + ⅔
3. 5x – 3y = -26
4. 4x + 9y = -2
