Intermediate Algebra (11th edition)

202 CHAPTER 3 Graphs, Linear Equations, and Functions xy 0 0 2 2 xy 2 3 2 3 REVIEW EXERCISES CHAPTER 3 3.1 Complete the tabl ...

3.3 Find an equation for each line. (a)Write the equation in slope-intercept form. (b)Write the equation in standard form. 25.Sl ...

3.5–3.6 Determine whether each equation or inequality defines y as a function of x. Give the domain in each case. Identify any l ...

17.The bar graph shows median household in- come for Asians and Pacific Islanders in the United States. (a)Use the information f ...

Graph each inequality or compound inequality. and 20.Which one of the following is the graph of a function? A. B. C. D. 3 ...

Solve each problem. 15.If each side of a square were increased by 4 in., the perimeter would be 8 in. less than twice the perime ...

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In the early 1970s, the NBC television network presented The Bill Cosby Show,in which the popular comedian played Chet Kincaid, ...

With regard to FIGURE 1, we can use a linear equation to model the graph of digi- tal camera sales (the blue equation below) and ...

(b) ✓ True ✓ False The ordered pair is not a solution of the system, since it does not make both equations true. 1 - 1, 7 2 11 = ...

There are three possibilities for the number of elements in the solution set of a linear system in two variables. 212 CHAPTER 4 ...

Thus, and giving the ordered pair Check this solution in both equations of the original system. CHECK (1) (2) ✓ True ✓ True Sinc ...

Step 4 Now solve for y. From Step 1, , so if then Let Step 5 Check the solution in both equations (1) and (2). CHECK (1) (2) ✓ T ...

NOTEIf an equation in a system contains decimal coefficients, it is best to first clear the decimals by multiplying by 10, 100, ...

Solving a System by Elimination Solve the system. (1) (2) Step 1 Both equations are in standard form. Step 2 Suppose that you wi ...

OBJECTIVE 5 Solve special systems.As we saw in FIGURES 3(b) AND (c), some systems of linear equations have no solution or an inf ...

The results of Examples 8 and 9are generalized as follows. 218 CHAPTER 4 Systems of Linear Equations NOW TRY EXERCISE 10 Write e ...

7.Concept Check Which ordered pair could be a solution of the graphed sys- tem of equations? Why? A. B. C. D. 8.Concept Check Wh ...

10.Concept Check Make up a system that has as its only solution. Decide whether the given ordered pair is a solution of the give ...

Solve each system by elimination. If the system is inconsistent or has dependent equations, say so. See Examples 6 – 9. SECTION ...