C4L5 Answers
8. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -2)(-2, 1)(1, ∞)
VA: x = 1, -2
HA: y = 0
OA: none
x-int: (0, 0)
y-int: (0, 0)
10. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, 1)(1, ∞)
VA: x = 1
HA: y = 2
OA: none
x-int: (-2, 0)
y-int: (0, -4)
12. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -2)(-2, 3)(3, ∞)
VA: x = -2, 3
HA: y = 0
OA: none
x-int: none
y-int: (0, -1)
14. 1.
2.
3.
4.
5.
already in simplified form
D: (-∞, -2)(-2, 2)(2, ∞)
VA: x = ±2
HA: none
OA: none
6. x-int: (±1, 0)
7.
8.
૚
y-int: ቀ૙, ቁ
૝
16. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -2)(-2, 0)(0, ∞)
VA: x = -2, 0
HA: none
OA: y = x – 2
x-int: (0, -1)
y-int: none
18. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -2)(-2, 2)(2, ∞)
VA: x = ±2
HA: y = 1
OA: none
x-int: (-4, 0)(3, 0)
y-int: (0, 3)
20. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -1)(-1, 1)(1, ∞)
VA: x = ±1
HA: y = 0
OA: none
x-int: (0, 0)
y-int: (0, 0)
22. 1.
2.
3.
4.
5.
already in simplified form
D: (-∞, -3)(-3, -1)(-1, 3)(3, ∞)
VA: x = ±3, -1
HA: y = 0
OA: none
6. x-int: none
7.
8.
૝
y-int: ቀ૙, ቁ
ૢ
26. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, 1)(1, ∞)
VA: x = 1
HA: none
OA: y = x + 4
x-int: (-1, 0)(-2, 0)
y-int: (0, -2)
28. 1.
2.
3.
4.
5.
already in simplified form
D: (-∞, -5)(-5, ∞)
VA: x = -5
HA: none
OA: y = x – 6
6. x-int: (4, 0)(-3, 0)
7.
8.
y-int: ቀ૙,
ି૚૛
૞
ቁ
30. 1.
2.
3.
4.
5.
6.
7.
8.
already in simplified form
D: (-∞, -1)(-1, ∞)
VA: x = -1
HA: none
OA: y = x – 2
x-int: (4, 0)(-3, 0)
y-int: (0, -12)
34. 1.
2. R(x) =
‫ିܠ‬૛
‫ܠ‬ା૜
, x ≠ -5, -3
3. D: (-∞, -5)(-5, -3)(-3, ∞)
4. VA: x = -3
5. HA: y = 1
OA: none
6. x-int: (2, 0)
7.
8.
y-int: ቀ૙,
ି૛
૜
ቁ
38. 1.
2.
3.
4.
5.
6.
7.
8.
R(x) = x – 5, x ≠ -6
D: (-∞, -6)(-6, ∞)
VA: none
HA: none
x-int: (5, 0)
OA: none
y-int: (0, -5)
50. a. y = 0
The concentration of the drug decreases to 0 as the
time increases.
b. graph
c. The concentration is highest at t = 5 minutes.