Splash Screen

WARM UP Find the perimeter of the figure. Answers: and 2.9 m

Homework/ Log on Questions 1.1 Variables and Expressions AGENDA Homework/ Log on Questions 1.1 Variables and Expressions AGENDA – Happy Monday!

Write verbal expressions for algebraic expressions. Objectives: Write verbal expressions for algebraic expressions. Write algebraic expressions for verbal expressions. Essential Question: How do I change words to algebraic expressions? Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. CCSS

What are some operations we know in the math world?

KC

A. Write a verbal expression for 8x2. Write Verbal Expressions A. Write a verbal expression for 8x2. Answer: eight times x squared Example 1

B. Write a verbal expression for y5 – 16y. Write Verbal Expressions B. Write a verbal expression for y5 – 16y. Answer: the difference of y to the fifth power and 16 times y Example 1

A. Write a verbal expression for 7a4. A. 7 times a B. 7 times the product of 4 and a C. 7 times a to the fourth power D. 4 times a to the seventh power Example 1

B. Write a verbal expression for x2 + 3. A. the sum of 3 and x B. the product of x squared and 3 C. the sum of x and 3 squared D. the sum of x squared and 3 Example 1

Reverse Reverse

A. Write an algebraic expression for 9 plus the product of 2 and d. Write Algebraic Expressions A. Write an algebraic expression for 9 plus the product of 2 and d. Answer: The expression can be written as 9 + 2d. Example 2

B. Write an algebraic expression for five less than a number c. Write Algebraic Expressions B. Write an algebraic expression for five less than a number c. The words less than suggest subtraction. a number c less five c – 5 Answer: Thus, the algebraic expression is c – 5. Example 2

C. Write an algebraic expression for two fifths of the area a. Write Algebraic Expressions C. Write an algebraic expression for two fifths of the area a. Example 2

A. Write an algebraic expression for nine more than a number h. A. 9 – h B. 9h C. 9 + h D. h – 9 Example 2

B. Write an algebraic expression for the difference of 6 and 4 times a number x. A. 6 – 4x B. (6 – 4) + x C. 6 + 4x D. 6x – 4 Example 2

C. Write an algebraic expression for one half the size of the original perimeter p. A. 2p B. C. p2 D. p Example 2

Answer: The cost of the tickets is represented by C= 2a + 3s. Write an Expression ENTERTAINMENT Mr. Nehru bought two adult tickets and three student tickets for the planetarium show. Write an algebraic expression that represents the cost of the tickets. Answer: The cost of the tickets is represented by C= 2a + 3s. Example 3

Answer: The cost of the purchase is y= 4x + 15. Write an Expression SHOPPING Ms. Rehak wants to purchase four dresses and a skirt. If the skirt costs $15, write an equation in which x represents the cost of the dresses and y represents the total cost of my purchase. Answer: The cost of the purchase is y= 4x + 15. Example 3

MONEY Lorenzo bought a bag of peanuts that cost p dollars and he gave the cashier a $20 bill. Write an expression for the amount of change that he will receive. A. 20 – p B. p – 20 C. 20 + p D. 20  p Example 3

Homework due tomorrow: P. 7-8 #25-35 Splash Screen

Group Practice What to do: Each pod needs a white board, marker, and eraser. One student will have their back to the board, while the other two students try to get the student with their back to the board to write down what they see on the board. After a few minutes, I will switch the slide, and each group can switch whose back is to the whiteboard.

EXAMPLE 3x-5

Round 1: KEY WORD Less than        

Round 2: KEY WORD Quotient        

Five multiplied by a to the fourth power EXAMPLE Five multiplied by a to the fourth power

the product of five and x squared Round 3: Guess them to guess the verbal expression the product of five and x squared Three less than four times y Three fifths of a number

Please put the white Boards, markers, and Erasers away. End Please put the white Boards, markers, and Erasers away.