1. Pre-Algebra During the intermission of the play, the Theater Club sold cups of popcorn and soda. The club sold 79 cups of popcorn and 96 sodas for a total of $271. What was the selling price of a cup of popcorn? Of a soda? Problem Solving Strategy: Guess, Check, Revise Lesson 2-7 You can organize conjectures in a table. As a first conjecture, try both with a price of $1. Additional Examples

2. Pre-Algebra (continued) Problem Solving Strategy: Guess, Check, Revise Lesson 2-7 PopcornSoda PricePriceTotal Price $1$179(1) + 96(1) = 79 + 96The total is too low. Increase = 175 the price of the popcorn only. $2$179(2) + 96(1) = 158 + 96The total is too low. = 254 Increase the price of the soda. $2$279(2) + 96(2) = 158 + 192The total is too high. = 350 Decrease the price of the popcorn. $1$279(1) + 96(2) = 79 + 192The total is correct. = 271 The popcorn price was $1, and the soda price was $2. Additional Examples

3. Pre-Algebra Problem Solving Strategy: Guess, Check, Revise Lesson 2-7 Solve using any strategy. 1.A sporting goods store manager ordered twice as many pairs of basketball shoes as tennis shoes. He ordered 96 pairs in all. How many pairs of each did he order? 2.Manuel wrote a 512-word paper over the weekend. He wrote 180 more words on Sunday than he did on Saturday. How many words did he write on Saturday? 166 32 pairs of tennis shoes; 64 pairs of basketball shoes Lesson Quiz