Beginning Algebra, 11th Edition

SECTION 2.7 Further Applications of Linear Equations^147 17.In a chemistry class, 12 L of a 12% alco- hol solution must be mixed ...

Work each problem involving monetary values. See Example 4. 148 CHAPTER 2 Linear Equations and Inequalities in One Variable 27.A ...

SECTION 2.7 Further Applications of Linear Equations^149 In Exercises 39 – 42, find the rate on the basis of the information pro ...

45.A train leaves Kansas City, Kansas, and travels north at 85 km per hr. Another train leaves at the same time and travels sout ...

SECTION 2.8 Solving Linear Inequalities^151 OBJECTIVES Solving Linear Inequalities 2.8 1 Graph intervals on a number line. 2 Use ...

Graphing Intervals on a Number Line Write each inequality in interval notation, and graph the interval. (a) The statement says t ...

OBJECTIVE 2 Use the addition property of inequality.Consider the true inequality If 4 is added to each side, the result is Add 4 ...

154 CHAPTER 2 Linear Equations and Inequalities in One Variable OBJECTIVE 3 Use the multiplication property of inequality. Consi ...

Divide by 3. x6- 6 3 x 3 6 - 18 3 3 x6- 18 SECTION 2.8 Solving Linear Inequalities 155 3 is positive. Do NOT reverse the directi ...

Step 2 Use the addition property of inequality. Add 3. Subtract x. Step 3 Use the multiplication property of inequality. Divide ...

The next example uses the idea of finding the average of a number of scores. In general, to find the average of n numbers, add t ...

Graphing a Three-Part Inequality Write the inequality in interval notation, and graph the interval. The statement is read “ is l ...

(b) Multiply each part by 3 to clear the fraction. Distributive property Add 3 to each part. Divide each part by 2. The solution ...

Concept Check Write an inequality involving the variable x that describes each set of num- bers graphed. 7. 8. 160 CHAPT ...

75.For what values of xwould the rectangle have a perimeter of at least 400? 76.For what values of xwould the triangle have a pe ...

77.For a certain provider, an international phone call costs $2.00 for the first 3 min, plus $0.30 per minute for each minute or ...

STUDY SKILLS Techniques To Improve Your Test Score Come preparedwith a pencil, eraser, paper, and calculator, if allowed. Scan t ...

2.1 equation linear equation in one variable solution solution set equivalent equations 2.3 conditional equation identity contra ...

CHAPTER 2 Summary^165 2.1 The Addition Property of Equality The same number may be added to (or subtracted from) each side of an ...

2.5 Formulas and Additional Applications from Geometry from Geometry To find the value of one of the variables in a formula, giv ...