splash screen. main idea/vocabulary variable algebra algebraic expression coefficient evaluate...
TRANSCRIPT
• variable
• algebra
• algebraic expression
• coefficient
• Evaluate simple algebraic expressions.
Evaluate an Algebraic Expression
Evaluate t – 4 if t = 6.
Answer: 2
t – 4 = 6 – 4 Replace t with 6.
= 2 Subtract.
Interactive Lab: Modeling Algebraic Expressions
1. A
2. B
3. C
4. D
A. 3
B. 7
C. 11
D. 28
Evaluate 7 + m if m = 4.
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
1. A
2. B
3. C
4. D
A. 2
B. 5
C. 24
D. 72
Evaluate 4a – 2b if a = 9 and b = 6.
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
1. A
2. B
3. C
4. D
A. 15
B. 18
C. 164
D. 441
Evaluate 24 – s2 if s = 3.
Answer: about 37.2°C
Subtract 32 from 99.
Multiply 5 and 67.
Divide 335 by 9.
Replace F with 99.
1. A
2. B
3. C
4. D
A. $4.25
B. $7.75
C. $9.25
D. $12.75
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.
End of the Lesson