Name ________________________________________ Date ___________________ Class __________________
LESSON
3-3
Practice B
Solving Inequalities by Multiplying or Dividing
Solve each inequality and graph the solutions.
1. 4a > 32
2. −7y < 21
_________________________________________
3. 1.5n ≤ −18
________________________________________
4. −
_________________________________________
5.
y
>4
5
________________________________________
6. 2s ≤ −3
_________________________________________
7. −
3
c≥9
8
1
b < −6
3
________________________________________
8.
_________________________________________
z
≥ −0.25
−8
________________________________________
Write and solve an inequality for each problem.
9. Phil has a strip of wood trim that is 16 feet long. He needs 5-foot pieces
to trim some windows. What are the possible numbers of pieces he can cut?
_________________________________________________________________________________________
10. A teacher buys a 128-ounce bottle of juice and serves it in
5-ounce cups. What are the possible numbers of cups she can fill?
_________________________________________________________________________________________
11. At an online bookstore, Kendra bought 4 copies of the same book
for the members of her book club. She got free shipping because her
total was at least $50. What was the minimum price of each book?
_________________________________________________________________________________________
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
3-20
Holt McDougal Algebra 1
4. c ≤ −24
4. Possible answer: 9
t + 5 = −9
t + 5 < −9
5.
−14 + 5 = −9 ;
−9 = −9
6
b
−
= 2 b−
6.
8 − 6 = 2; 9 −
2 = 2
−13 + 5 < −9 ; no
−8 < −9
6 ≥ 2
6 ≥ 2 ; yes
3 ≥ 2
5. y > 20
6. s ≤ −1.5
LESSON 3–3
7. b > 18
Practice A
1. x ≥ 3
8. z ≤ 2
2. a < 5
9. 5p ≤ 16; p ≤ 3.2; 0, 1, 2, or 3 pieces
10. 5s ≤ 128; s ≤ 25.6; 0 to 25 cups
3. b > 4
11. 4b ≥ 50; b ≥ 12.50; $12.50 each
4. y ≤ −2
Practice C
5. x > −4
3. c ≤ −1
1. a > 17
2. b ≤ −6
2
3
4. x ≥ −14.6
5. y ≥ −7.5
6. z > 5.2
1
7. n < −
8
12
2
8. p > −
or p > − 2
5
5
6. k < −3
7. n ≤ 6
9. k ≥ −40
10. −4x ≤ 24; x ≥ −6
8. x ≥ 0
11.
x
≥ 3; x ≥ 45
15
12.
2
x ≤ −16; x ≤ −24
3
9. 2b ≤ 15; b ≤ 7.5; 0, 1, 2, 3, 4, 5, 6, or 7 bags
10. 18c ≤ 153; c ≤ 8.5; 0, 1, 2, 3, 4, 5, 6, 7, or
8 CDs
Practice B
1. a > 8
13. 12d ≥ 45; d ≥ 3.75; 4 boxes
Review for Mastery
2. y > −3
1. x ≥ −6
3. n ≤ −12
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
A27
Holt McDougal Algebra 1