1. 1-2 Writing Algebraic Expressions Warm Up Evaluate each expression for the given values of the variables. Homework: Page 12 #11-31 all. 23 18 1 1. 9y – 13 for y = 4 2. 6n + 2p for n = 2 and p = 3 3. 3x – y for x = 1 and y = 2

2. 1-2 Writing Algebraic Expressions Which operation symbol goes with each word? +   – 1. Sum 2. Product 3. Quotient 4. Difference

3. 1-2 Writing Algebraic Expressions a number plus 5 add 5 to a number sum of a number and 5 5 more than a number a number increased by 5 a number minus 11 subtract 11 from a number difference of a number and 11 11 less than a number a number decreased by 11 3 times a number 3 multiplied by a number product of 3 and a number a number divided by 7 7 divided into a number quotient of a number and 7 + –   Word Phrases Expression n + 5 x – 11 3m3m or a  7 a 7

4. 1-2 Writing Algebraic Expressions Write an algebraic expression for each word phrase. 5. 9 less than a number w 9 less than a number w w – 9 6. 3 increased by the difference of p and 5 3 increased by the difference of p and 5 3 + (p – 5) 3 + p – 5

5. 1-2 Writing Algebraic Expressions Write an algebraic expression for each word phrase. 7. the sum of a number h and 88 minus 4 the sum of h and 88 minus 4 h + 88 – 4 8. the quotient of a number f and 6 quotient of f and 6 f  6 f 6

6. 1-2 Writing Algebraic Expressions 9. Write a word phrase for the algebraic expression 9 – 3c. 9 – 3c 9 minus the product of 3 and c 9 minus the product of 3 and c.

7. 1-2 Writing Algebraic Expressions 10. Write a word phrase for the algebraic expression 7 + 19b. 7 + 19b 7 plus the product of 19 and b 7 plus the product of 19 and b.

8. 1-2 Writing Algebraic Expressions 11. A restaurant leased its banquet hall for a function. The cost was $10 per person. Write an algebraic expression to evaluate what the cost would be if 20, 21, 22, or 23 people attended the function. $10 dollars nCombine n equal amounts of $10. $10nIn dollars 20 $10 20 $200 21 $10 21 $210 22 $10 22 $220 23 $10 23 $230 n $10 n Cost Evaluate for n = 20, 21, 22, and 23.

9. 1-2 Writing Algebraic Expressions 12. Gasoline costs $3.59 per n gallons. What will the cost be for 10, 12, 14, and 15 gallons? $3.59 nCombine n equal amounts of $3.59. $3.59nIn dollars 10 $3.59 10 $35.90 12 $3.59 12 $43.08 14 $3.59 14 $50.26 15 $3.59 15 $53.85 n $3.59 n Cost Evaluate for n = 10, 12, 14, and 15.

10. 1-2 Writing Algebraic Expressions 13. Write a word problem that can be evaluated by the algebraic expression 27 + t, and evaluate the expression for t = 1.76. Possible Answer: Amed bought a new sweater for $27 plus sales tax t. If the tax was $1.76, what was the total cost of the sweater? 27 + t 27 + 1.76 = 28.76 Substitute 1.76 for t. The total cost of the sweater was $28.76.

11. 1-2 Writing Algebraic Expressions 14. Write a word problem that can be evaluated by the algebraic expression 43 – d, and evaluate the expression for d = 10.24. Possible Answer: Tina bought a new jacket for $43 minus a store credit. If the store credit was $10.24, what was the total cost of the jacket? 43 – d 43 – 10.24 = 32.76 Substitute 10.24 for t. The total cost of the jacket was $32.76.