Solve the inequalities by displaying the solutions on a calculator. See Examples 9 and 10. 40(x

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Solve the inequalities by displaying the solutions on a calculator. See Examples 9 and 10.

40(x − 2) > x + 60


Data from Example 10

Display the solution of the inequality −1 < 2x + 3 < 6 (see Example 6) on a calculator. In order to display the solution, we must write the inequality as −1 < 2x + 3 and 2x + 3 < 6

Then enter y1 = −1 < 2x + 3 and 2x + 3 < 6 (consult the manual to determine how “and” is entered) in the calculator, as shown in Fig. 17.15(a). From Fig. 17.15(b), we see that the solution is −2 < x < 1.5. The trace and zoom features can be used to get accurate values. Compare Fig. 17.15(b) with Fig. 17.10.

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Basic Technical Mathematics

ISBN: 9780137529896

12th Edition

Authors: Allyn J. Washington, Richard Evans

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