Name
LESSON
Date
Lesson 2.5
2.5 Practice A
For use with pages 90–95
Solve the equation. Check your solution.
1. a 5 7
2. z 4 2
3. g 3 8
4. 12 b 9
5. 3 c 7
6. 10 f 6
7. d 8 4
8. h 1 16
9. k 5 9
10. 14 m 7
11. 18 w 2
12. 21 y 6
13. 24 j 16
14. x 11 3
15. 17 u 10
16. The advertised price of a video game system is $100 after a $40 mail-in
rebate. Using the verbal model below, write and solve an equation to find
the price of the video game system before the rebate is applied.
Price before
Rebate
Price after
rebate
amount
rebate
17. From 1994 to 2004, the population of a town increased by 310 people. The
population in 2004 was 5614 people. Write and solve an equation to find
the population in 1994.
Solve the equation. Check your solution.
18. 4 9 m 13
19. 11 r 5 8
20. t 2 10 17
21. 16 a 3 7
22. z 6 12 14
23. 1 5 15 d
24. The triangle shown has a perimeter of 47 inches. Write an equation to find
the value of x in the triangle. Then solve the equation.
18 in.
x
15 in.
25. The triangle shown has a perimeter of 40 centimeters. Write an equation to
find the value of x in the triangle. Then solve the equation.
x
8 cm
15 cm
Copyright © Holt McDougal.
All rights reserved.
Pre-Algebra
Chapter 2 Resource Book
95
Answers
Lesson 2.4 continued
Challenge Practice
2. 56
1. 10
Review for Mastery
3. 33
4. 15 5. 2.5 lb
120
7. 30; 4
r
6. 4 x 10; 14
8. 8; 2x must be equal to 16 because
16 3 13 and 2 p 8 16.
x
9. 4; must be equal to 1 because 1 2 3
4
4
and 1.
4
Lesson 2.5
1. 35
2. 7
3. 4
4. 10
5. 15
6. 6
7. 13
8. 4
9. 2
10. 1
11. 13
12. 30
13. $48
14. 29 km
Challenge Practice
1. 573
2. –293
3. 15
6. 5 cm
7. $15
8. 1.5 h; 6:00 P.M.
4. 2
5. 5 in.
9. x 7 46
Lesson 2.6
Practice A
Practice A
2. 2
1. 2
3. 11
6. 16
7. 12
11. 16
12. 15
5. 10
4. 3
8. 15
9. 14
13. 40
10. 21
14. 14
15. 27
16. p 40 100; $140
17. p 310 5614; 5304 people
19. 8
20. 5
21. 12
22. 4
18. 0
23. 19
24. 47 x 18 15; 14 in.
Practice B
2. 17
6. 19
7. 17
12. 41
13. 3
3. 8
5. 29
4. 8
8. 25
9. 42
10. 2
14. 36
15. 25
11. 7
16. a 3 15; 18 years old
17. p 0.8 1.7; $2.50
18. 160 p 23; 137 players
21. 9
23. 9
22. 16
26. 7 cm
24. 25
Practice B
1. 14
2. 19
3. 22
7. 99
8. 160
9. 704
11. 180
12. 324
19. a. A 9x
b. 74 days
4. 9
5. 27
6. 21
7. 45
8. 8
9. 64
10. 13
14. 58
16. a. x 20
b. 14 years old
18. 175 points
19. 31 ft
22. 38 y 7
5. 6
6. 40
10. 294
14. 9
13. 7
15. 84
17. about 2.7 hours
b. 12 inches
Practice C
3. 4
13. 77
4. 8
18. 33 miles per gallon
2. 21
21. 12 m
20. 9 ft
16. 64 4t; 16 teams
1. 92
12. 17
19. 4 hours
25. 29 in.
Practice C
11. 29
75
5k
5
5
k 15
2. 7 3. 11 4. 2 5. 8 6. 4 7. 5
8. 56 9. 66 10. 108 11. 65 12. 240
13. 57 14. 7 15. 4 16. 18
20. 0
19. 6
27. 16 ft
28. a. 120,000 gallons
5k 75
t
17. 18 ; 288 points 18. a. 24 12t;
16
2 minutes b. 50 10t; 5 minutes
25. 40 8 15 x; 17 cm
1. 12
1. Divide both sides by 5:
15. 41
1. 22
2. 12
3. 81
6. 1566
7. 32
8. 12
4. 744
5. 768
9. 14
10. 210 11. 75 12. 7 13. a. A 27.5x
b. 24 feet 14. $90 15. a. 150x
17. $7.50
20. 43 cm
23. 39 b 12
24. $38
A14
Pre-Algebra
Chapter 2 Resource Book
Copyright © Holt McDougal.
All rights reserved.