1. Standards Practice NS 1.2
A Practice by Example Model each expression.
Example 1 1. 3 x 5 Guided Practice
(page 8) This exercise has been
started for you!
Use for x. Use for 1.
2. x 3 3. 8 4. x 4 5. 4 2x
6. 3 x 1 7. 5x 8. 1 x 9. 2 x 6
Example 2 Evaluate each expression.
(page 9)
10. 24 d for d 3 Guided Practice
This exercise has been
24 d 24 3 started for you!
11. p 8 for p 5 12. 8 b 12 for b 2
For: Examples 1–3
Visit: PHSchool.com 13. 18 3 y for y 3 14. ( g 9) 3 for g 6
Web Code: axe-0102
15. 21 (t 2) for t 9 16. 10 m 5 for m 1.5
Example 3 17. The rental fee for a bicycle is $5, plus $2
Hour Rental Fee
(page 9) for each hour h the bike is rented. The
h 5 2h
expression for the total cost is 5 2h. Copy
and complete the table for the given number 1 ■
of hours. 2 ■
3 ■
Copy and complete each table.
18. x x 6 19. x 7x 20. x 100 x
1 7 2 20
4 4 35
7 6 50
B Apply Your Skills 21. Guided Problem Solving The formula P 2 2 w gives the
distance around a rectangle with length and width w. Find P for a
rectangle with length 7 cm and width 4 cm.
• Replace each variable in the formula with the given values.
• Use the order of operations to simplify the expression.
22. A dog walker charges $10 to walk a large dog and $6 to walk a small
dog. She uses 10 d 6s to calculate her earnings, where d is the
number of large dogs and s is the number of small dogs. How much
does she earn for walking each group?
a. 4 large and 2 small dogs b. 6 small dogs
10 Chapter 1 Variables and Algebraic Expressions 1-2 Algebraic Expressions