By Margaret L. Lial
Is there something extra appealing than an “A” in Algebra? to not the Lial workforce! Marge Lial, John Hornsby, and Terry McGinnis write their textbooks and accompanying assets with one aim in brain: giving scholars all of the instruments they should be successful. With this revision, the Lial crew has additional subtle the presentation and routines during the textual content. they provide numerous intriguing new assets for college kids that might supply additional aid whilst wanted, whatever the studying setting (classroom, lab, hybrid, on-line, etc)–new learn abilities actions within the textual content, an increased video software to be had in MyMathLab and at the Video assets on DVD, and extra!
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Extra resources for Algebra for College Students, 7th Edition
Multiplication Property of 0 For any real number a, the following are true. NOW TRY ANSWERS 4. 4 EXERCISES Concept Check Choose the correct response in Exercises 1–4. 1. The identity element for addition is A. - a B. 0 C. 1 D. 2. The identity element for multiplication is 1 . a A. - a 3. The additive inverse of a is A. - a Concept Check B. 0 C. 1 D. B. 0 C. 1 D. 1 . a 4. The multiplicative inverse of a, where a Z 0, is 1 . a A. - a B. 0 C. 1 D. 1 . a Complete each statement. 5. The multiplication property of 0 says that the of 0 and any real number is 6.
Recall that the answer to an addition problem is called the sum. The rules for adding real numbers follow. Adding Real Numbers Same sign To add two numbers with the same sign, add their absolute values. The sum has the same sign as the given numbers. Different signs To add two numbers with different signs, find the absolute values of the numbers, and subtract the lesser absolute value from the greater. The sum has the same sign as the number with the greater absolute value. EXAMPLE 1 Adding Two Negative Real Numbers Find each sum.
See Example 5. 43. | - 8 | 44. | - 19 | 45. ` 3 ` 2 46. ` 47. - | 5 | 48. - | 12 | 49. - | - 2 | 50. - | - 6 | 51. 5 | 52. 4 | 53. | - 2 | + | 3 | 54. | - 16 | + | 14 | 55. | - 9 | - | - 3 | 56. | - 10 | - | - 7 | 57. | - 1 | + | - 2 | - | - 3 | 58. | - 7 | + | - 3 | - | - 10 | 3 ` 4 Solve each problem. See Example 6. 59. The table shows the percent change in population from 2000 through 2008 for selected metropolitan areas. Metropolitan Area 60. S. S. trade partners for October 2009. S. Census Bureau.
Algebra for College Students, 7th Edition by Margaret L. Lial