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Learning Target I CAN write verbal expressions for algebraic expressions and algebraic expressions for verbal expressions. Then/Now

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**Algebraic expression – consists of sums and/or products of numbers and variables.**

Variable – symbols used to represent unspecified numbers or values. Term – an expression that is either a number, variable, or a product of numbers and variables.

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**Power – an expression of the for xn. **

In multiplication, the quantities being multiplied are factors, and the result is the product. Power – an expression of the for xn. Exponent (n) – superscript of the power. Base (x) – the number raised to the power. f

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**A. Write a verbal expression for 8x2.**

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

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**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

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**A B C D 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 A B C D Example 1

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**A B C D 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 A B C D Example 1

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KC

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**A. Write an algebraic expression for 5 less than a number c.**

Write Algebraic Expressions A. Write an algebraic expression for 5 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

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**B. Write an algebraic expression for 9 plus the product of 2 and d.**

Write Algebraic Expressions B. Write an algebraic expression for 9 plus the product of 2 and d. Plus implies add, and product implies multiply. Answer: The expression can be written as 9 + 2d. Example 2

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**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. The word of implies multiply. Example 2

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**A. Write an algebraic expression for nine more than a number h.**

A. 9 – h B. 9h C. 9 + h D. h – 9 A B C D Example 2

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**B. Write an algebraic expression for the difference of 6 and 4 times a number x.**

A. 6 – 4x B. (6 – 4)x C x D. 6x – 4 A B C D Example 2

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**C. Write an algebraic expression for one half the size of the original perimeter p.**

A. 2p B. C. p2 D. p A B C D Example 2

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**Answer: The cost of the tickets is represented by 2a + 3c.**

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. Let a be the cost of each adult ticket and c be the cost of each student ticket. The cost of the adult tickets is represented by 2a and the cost of the student tickets is represented by 3c. Answer: The cost of the tickets is represented by 2a + 3c. Example 3

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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 p D. 20 p A B C D Example 3

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Multiply and Divide Rational Numbers, Writing Verbal Expressions Algebraically Objective: To multiply and divide rational numbers. To write verbal expressions.

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