Intermediate Algebra (11th edition)

46 CHAPTER 1 Review of the Real Number System STUDY SKILLS Take time to read each section and its examples before doing your hom ...

Despite increasing competition from the Internet and video games, television remains a popular form of entertainment. In 2009, 1 ...

48 CHAPTER 2 Linear Equations, Inequalities, and Applications OBJECTIVES OBJECTIVE 1 Distinguish between expressions and equatio ...

Equivalent equationsare related equations that have the same solution set. To solve an equation, we usually start with the given ...

50 CHAPTER 2 Linear Equations, Inequalities, and Applications CHECK Original equation Let Multiply. - 11 =- 11 ✓ True - 12 + 6 - ...

Step 4 Use the multiplication property of equality to isolate xon the left. Divide by 4. Step 5 Check by substituting 4 for xin ...

Some equations have decimal coefficients. We can clear these decimals by multi- plying by a power of 10, such as and so on. This ...

Recognizing Conditional Equations, Identities, and Contradictions Solve each equation. Decide whether it is a conditional equati ...

54 CHAPTER 2 Linear Equations, Inequalities, and Applications Complete solution available on the Video Resources on DVD 2.1 EXER ...

46.Suppose that in solving the equation , we begin by multiplying each side by 12, rather than the leastcommon denominator, 6. W ...

56 CHAPTER 2 Linear Equations, Inequalities, and Applications STUDY SKILLS You are ready to do your homework AFTERyou have read ...

OBJECTIVE 1 Solve a formula for a specified variable. The formula says that interest on a loan or investment equals principal (a ...

Solve for W. Step 1 is not needed here, since there are no fractions in the formula. Step 2 Subtract 2L. Combine like terms. Ste ...

Solving an Equation for One of the Variables Solve the equation for y. Our goal is to isolate yon one side of the equation. Subt ...

OBJECTIVE 3 Solve percent problems. An important everyday use of mathe- matics involves the concept of percent. Percent is writt ...

Since 39.3% was spent on food, let this amount in billions of dollars. Multiply by 41.2. Nearest tenth Therefore, about $16.2 bi ...

(b)The enrollment at a community college declined from 12,750 during one school year to 11,350 the following year. Find the perc ...

13.Concept Check When a formula is solved for a particular variable, several different equivalent forms may be possible. If we s ...

26.As of 2009, the lowest temperature ever recorded in South Dakota was 58°F. Find the corresponding Celsius temperature. (Sourc ...

In the formula, u is the amount of unearned interest (money saved) when a loan scheduled to run for n payments is paid off k pay ...