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Splash Screen

Evaluate simple algebraic expressions. variable algebra algebraic expression coefficient Main Idea/Vocabulary

Interactive Lab: Modeling Algebraic Expressions Evaluate an Algebraic Expression Evaluate t – 4 if t = 6. t – 4 = 6 – 4 Replace t with 6. = 2 Subtract. Answer: 2 Interactive Lab: Modeling Algebraic Expressions Example 1

Evaluate 7 + m if m = 4. A. 3 B. 7 C. 11 D. 28 A B C D Example 1

Evaluate 5x + 3y if x = 7 and y = 9. Evaluate Expressions Evaluate 5x + 3y if x = 7 and y = 9. 5x + 3y = 5(7) + 3(9) Replace x with 7 and y with 9. = 35 + 27 Do all multiplications first. = 62 Add 35 and 27. Answer: 62 Example 2

Evaluate 4a – 2b if a = 9 and b = 6. C. 24 D. 72 A B C D Example 2

Evaluate Expressions Evaluate 5 + a2 if a = 5. 5 + a2 = 5 + 52 Replace a with 5. = 5 + 25 Evaluate the power. = 30 Add. Answer: 30 Example 3

Evaluate 24 – s2 if s = 3. A. 15 B. 18 C. 164 D. 441 A B C D Example 3

Example 4

Replace F with 99. Subtract 32 from 99. Multiply 5 and 67. Divide 335 by 9. Answer: about 37.2°C Example 4

BOWLING David is going bowling with a group of friends BOWLING David is going bowling with a group of friends. His cost for bowling can be described by the formula 1.75 + 2.5g, where g is the number of games David bowls. Find the total cost of bowling if David bowls 3 games. A. $4.25 B. $7.75 C. $9.25 D. $12.75 A B C D Example 4

End of the Lesson End of the Lesson