The symbol is read “is approximately equal to” and is used when writing approximations. Calculator Exercises Use a calculator to approximate the irrational numbers. Remember to use the appropriate symbol, , when expressing answers. 1. 112 2. 199 3. 4 p 4. 1p p 3.141592654 and 13 1.732050808 Study Skills Exercise Look over the notes that you took today. Do you understand what you wrote? If there were any rules, definitions, or formulas, highlight them so that they can be easily found when studying for the test. Vocabulary and Key Concepts 1. a. A is a symbol or letter used to represent an unknown number. b. Values that do not vary are called . c. In mathematics, a well-defined collection of elements is called a . d. The statements a 6 b, a 7 b, and a b are examples of . e. The statement a 6 b is read as “ .” f. The statement c d is read as “ .” g. The statement is read as “ .” h. Two numbers that are the same distance from 0 but on opposite sides of 0 on the number line are called . i. The absolute value of a real number, a, is denoted by and is the distance between a and on the number line. Review Exercises For Exercises 2–4, simplify. 2. 3. 4. Concept 1: Variables and Expressions For Exercises 5–14, evaluate the expressions for the given substitution. (See Examples 1–2.) 5. y 3 when y 18 6. 3q when q 5 7. when 8. when t 5 8 w w 12 6 2 3 9. 6d when 10. when h 10 5d h 15 t 4 1 2 1 5 6 4 1 2 1 5 6 4 1 2 1 5 6 5 6 Section 1.2 Introduction to Algebra and the Set of Real Numbers 31 Section 1.2 Practice Exercises
miller_beginning_intermediate_algebra_4e_ch1_3
To see the actual publication please follow the link above