1. Splash Screen

2. Five-Minute Check (over Lesson 1–1) Then/Now New Vocabulary
Example 1: Translate Phrases into Algebraic Expressions
Key Concept: Substitution Property of Equality
Example 2: Evaluate Expressions
Example 3: Evaluate Expressions
Example 4: Use Expressions to Solve Problems
Lesson Menu

3. A B C D Evaluate the expression 54 – 42 ÷ 7. A. 48 B. 46 C. 1.7 D. 1.5
5-Minute Check 1

4. A B C D Evaluate the expression 80 + 6(11). A. 946 B. 846 C. 146
5-Minute Check 2

5. A. B. C.
D. 3 A B C D
5-Minute Check 3

6. A B C D Write a numerical expression for thirteen more than eight.
5-Minute Check 4

7. A B C D Write a numerical expression for thirty-six divided by two.
5-Minute Check 5

8. The table shows the price for theater tickets at a local movie theater
The table shows the price for theater tickets at a local movie theater. Which expression could be used to find the total cost of admission for 1 adult, 3 children, and 2 students? A B C D
A. 3(5.50) + 2(6.00)
B. 2(5.50) + 3(6.00)
C. 3(8.50) + 2(6.00)
D. 3(5.50) + 2(6.00)
5-Minute Check 6

9. You have already written numerical expressions. (Lesson 1–1)
Translate verbal phrases into algebraic expressions.
Evaluate expressions containing variables.
Then/Now

10. algebra
variable
algebraic expression
defining a variable
Vocabulary

11. Answer: The expression is t + 35.
Translate Phrases into Algebraic Expressions
A. Translate the phrase 35 more than the number of tickets sold into an algebraic expression.
Answer: The expression is t + 35.
Example 1A

12. Answer: The expression is 6n – 10.
Translate Phrases into Algebraic Expressions
B. Translate the phrase the difference of six times a number and ten into an algebraic expression.
Answer: The expression is 6n – 10.
Example 1B

13. A. Translate the phrase eight less than the number of cookies baked into an algebraic expression.
A. c – 8
B. 8 – c
C. –8 – c
D. –c – 8 A B C D
Example 1A

14. B. Translate the phrase the sum of twelve and five times a number into an algebraic expression.
B n
C n
D. 17n A B C D
Example 1B

15. Concept

16. Evaluate x – y + 6 if x = 27 and y = 12.
Evaluate Expressions
Evaluate x – y + 6 if x = 27 and y = 12.
x – y + 6 = 27 – Replace x with 27 and y with 12.
= Subtract 12 from 27.
= 21 Add 15 and 6.
Answer: 21
Example 2

17. A B C D Evaluate 12 + a – b if a = 7 and b = 11. A. 30 B. 16 C. 8
Example 2

18. A. Evaluate 6y – 4x if x = 3, y = 4, and z = 7.
Evaluate Expressions
A. Evaluate 6y – 4x if x = 3, y = 4, and z = 7.
6y – 4x = 6(4) – 4(3) Replace y with 4 and x with 3.
= 24 – 12 Multiply.
= 12 Subtract.
Answer: 12
Example 3A

19. B. Evaluate if x = 3, y = 4, and z = 7.
Evaluate Expressions
B. Evaluate if x = 3, y = 4, and z = 7.
Rewrite as a division expression.
Replace z with 7, x with 3, and y with 4.
Subtract.
Divide.
Answer: 1
Example 3B

20. C. Evaluate 5z + (x + 4y) –15 if x = 3, y = 4, and z = 7.
Evaluate Expressions
C. Evaluate 5z + (x + 4y) –15 if x = 3, y = 4, and z = 7.
5z + (x + 4y) – 15
= 5(7) + (3 + 4 ● 4) – 15 Replace z with 7, x with 3, and y with 4.
= 5(7) + (3 + 16) – 15 Multiply 4 and 4.
= 5(7) + 19 – 15 Add 3 and 16.
Example 3C

21. = 35 + 19 – 15 Multiply 5 and 7. = 54 – 15 Add 35 and 19.
Evaluate Expressions
= – 15 Multiply 5 and 7.
= 54 – 15 Add 35 and 19.
= 39 Subtract 15 from 54.
Answer: 39
Example 3C

22. A B C D A. Evaluate 5p – 3m if m = 9 and p = 6. A. 3 B. 13 C. 22 D. 28
Example 3A

23. A B C D B. Evaluate if m = 9, n = 4, and p = 6. A. 4 B. C. D. 6
Example 3B

24. A B C D C. Evaluate p + (8n – 3m) if m = 9, n = 4, and p = 6. A. 23
Example 3C

25. Use Expressions to Solve Problems
A. THEATER East Middle School sold tickets for a school play. The price of an adult ticket was $3, and the price of a student ticket was $1. Write an expression that represents the total amount of money collected.
Example 4A

26. Use Expressions to Solve Problems
Answer: The expression 3a + 1s can be used to find the total amount of money collected.
Example 4A

27. Replace a with 70 and s with 85.
Use Expressions to Solve Problems
B. THEATER East Middle School sold tickets for a school play. The price of an adult ticket was $3 and the price of a student ticket was $1. Suppose 70 adult tickets and 85 student tickets were sold. How much money was collected?
Replace a with 70 and s with 85.
Multiply.
Add.
Answer: The amount of money collected was $295.
Example 4B

28. A. RETAIL The Read It Bookstore is advertising a sale
A. RETAIL The Read It Bookstore is advertising a sale. The price of hardback books is $9.50 and the price of paperback books is $4.50. Write an expression that can be used to find the total amount of money spent at the bookstore. A
B. ( )hp
C. h + p
D. 9.5h + 4.5p A B C D
Example 4A

29. B. RETAIL The Read It Bookstore is advertising a sale
B. RETAIL The Read It Bookstore is advertising a sale. The price of hardback books is $9.50 and the price of paperback books is $4.50. Suppose Emily buys 5 hardback books and 4 paperback books. Find the total amount she spent at the book sale.
A. $85.50
B. $65.50
C. $60.50
D. $126.00 A B C D
Example 4B

30. End of the Lesson

31. End of Custom Shows