Welcome to Interactive Chalkboard Mathematics: Applications and Concepts, Course 2 Interactive Chalkboard Copyright © by The McGraw-Hill Companies, Inc. Developed by FSCreations, Inc., Cincinnati, Ohio Send all inquiries to: GLENCOE DIVISION Glencoe/McGraw-Hill 8787 Orion Place Columbus, Ohio 43240

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Contents Lesson 1-1A Plan for Problem Solving Lesson 1-2Powers and Exponents Lesson 1-3Order of Operations Lesson 1-4Algebra: Variables and Expressions Lesson 1-5Algebra: Equations Lesson 1-6Algebra: Properties Lesson 1-7Sequences Lesson 1-8Measurement: The Metric System Lesson 1-9Scientific Notation

Lesson 4 Contents Example 1Evaluate an Expression Example 2Evaluate Expressions Example 3Evaluate Expressions Example 4Evaluate Expressions Example 5Use an Expression to Solve a Problem

Example 4-1a Answer: 2 Evaluate

Example 4-1b Answer: 11 Evaluate

Example 4-2a Answer: 62 Replace x with 7 and y with 9. Add 35 and 27. Use the order of operations. Evaluate

Example 4-2b Answer: 24 Evaluate

Example 4-3a Answer: 21 Replace r with 7 and s with 12. Divide. The fraction bar is like a grouping symbol. Evaluate

Example 4-3b Answer: 12 Evaluate

Example 4-4a Replace a with 5. Add 5 and 25. Use the order of operations. Answer: 30 Evaluate

Example 4-4b Answer: 15 Evaluate

Example 4-5a PHYSICS The final speed of a falling object is found by using the expression v + 9.8t, where v is the speed when you begin timing and t is the length of time the object falls. Find the final speed when the object starts falling at 3 meters per second and falls for 2 seconds. Replace v with 3 and t with 2. Add 3 and Use the order of operations. Answer: The final speed of the object is 22.6 meters per second.

Example 4-5b BOWLING David is going bowling with a group of friends. His cost for bowling can be described by the formula g, where g is the number of games David bowls. Find the total cost of bowling if David bowls 3 games. Answer: $9.25

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