Beginning Algebra, 11th Edition

117.In 1998, undergraduate college students had an average (mean) credit card balance of $1879. The average balance increased $8 ...

48 CHAPTER 1 The Real Number System The two tables show the heights of some selected mountains and the depths of some selected t ...

SECTION 1.6 Multiplying and Dividing Real Numbers^49 OBJECTIVES Multiplying and Dividing Real Numbers 1.6 1 Find the product of ...

OBJECTIVE 2 Find the product of two negative numbers. Look at another pattern. - 51 - 12 =? - 5102 = 0 - 5112 =- 5 - 5122 =- 10 ...

OBJECTIVE 4 Use the reciprocal of a number to apply the definition of division. Recall that the result of division is called the ...

We can use multiplication to check a division problem. Consider Example 3(a). 12 3 = 4 , since 4 # 3 =12. 52 CHAPTER 1 The Real ...

From the definitions of multiplication and division of real numbers, and so Based on this example, the quotient of a positive an ...

OBJECTIVE 6 Evaluate expressions involving variables. Evaluating Expressions for Numerical Values Evaluate each expression for a ...

(c) Two-thirds ofthe sum of 5 and 3 simplifies to or (d) 15 %of the difference between 14 and 2 0.15 314 - 1 - 224 simplifies to ...

(b)The sumof a number and 9 is12. Since the solution of this equation is 3. (c) The difference betweena number and 5 is0. Since ...

Find each product. See Examples 1 and 2. 25. 26. 27. 28. Find all integer fa ...

Write a numerical expression for each phrase and simplify. See Examples 7 and 8. 58 CHAPTER 1 The Real Number System 93.The prod ...

127.An integer is divisible by 4 if its last two digits form a number divisible by 4, and not otherwise. Show that (a)6,221,464 ...

60 CHAPTER 1 The Real Number System 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. ...

SECTION 1.7 Properties of Real Numbers^61 NOW TRY ANSWERS (a) 7 (b) (a) (b) 35 # 1 - 424 # 9 1 - 9 + 32 + 7 5 OBJECTIVE 2 Us ...

62 CHAPTER 1 The Real Number System Using the Identity Properties Use an identity property to complete each statement. (a) Ident ...

SECTION 1.7 Properties of Real Numbers^63 Using the Inverse Properties Use an inverse property to complete each statement. (a) T ...

64 CHAPTER 1 The Real Number System The distributive propertysays that multiplying a number aby a sum of num- bers gives the sam ...

SECTION 1.7 Properties of Real Numbers^65 (f ) Distributive property in reverse Add. Multiply. (g) Distributive property in reve ...

66 CHAPTER 1 The Real Number System Here is a summary of the properties of real numbers discussed in this section. Properties of ...