# Algebra for College Students, 7th Edition by Margaret L. Lial

By Margaret L. Lial

Is there something extra attractive than an “A” in Algebra? to not the Lial group! Marge Lial, John Hornsby, and Terry McGinnis write their textbooks and accompanying assets with one target in brain: giving scholars all of the instruments they should be successful.   With this revision, the Lial workforce has extra sophisticated the presentation and workouts during the textual content. they provide a number of fascinating new assets for college kids that would supply additional aid whilst wanted, whatever the studying surroundings (classroom, lab, hybrid, on-line, etc)–new learn abilities actions within the textual content, an extended video application 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

Sample text

Trade partners for October 2009. S. Census Bureau. (a) Which metropolitan area had the greatest change in population? What was this change? Was it an increase or a decline? (b) Which metropolitan area had the least change in population? What was this change? Was it an increase or a decline? S. Census Bureau. S. , while a positive balance means that exports exceeded imports. (a) Which country had the greatest discrepancy between exports and imports? (b) Which country had the least discrepancy between exports and imports?

CAUTION A number and its additive inverse have opposite signs. However, a number and its reciprocal always have the same sign. The result of dividing one number by another is called the quotient. For example, we can write the quotient of 45 and 3 as 45 3 , which equals 15. The same answer 1 will be obtained if 45 and 3 are multiplied, as follows. NOW TRY ANSWERS 6. 2 19 This suggests the following definition of division of real numbers. Division For all real numbers a and b (where b Z 0), a ‫؍‬a b a،b‫؍‬ # 1 .

The additive inverse (or opposite) of a number a is - a. Additive inverses have a sum of 0 (the additive identity). OBJECTIVE 3 1 1 Additive inverses and , - 34 and 34 (sum of 0) 2 2 The multiplicative inverse (or reciprocal) of a number a is 1a (where a Z 0), and multiplicative inverses have a product of 1 (the multiplicative identity). 1 1 3 4 Multiplicative inverses 5 and and - 2, and , (product of 1) 5 2 4 3 5 and - - 5, This discussion leads to the inverse properties of addition and multiplication.