152 Chapter 2 Linear Equations and Inequalities Topic: Using the Key on a Calculator In Example 6 we could have obtained a more accurate result if we had used the key on the calculator. Note that parentheses are required to divide 188.4 by the quantity This guarantees that the calculator follows the implied order of operations.Without parentheses, the calculator would divide 188.4 by 2 and then multiply the result by Scientific Calculator Enter: 188.4 2 Result: 29.98479128 correct Enter: 188.4 2 Result: 295.938028 incorrect Graphing Calculator Calculator Exercises Approximate the expressions with a calculator. Round to three decimal places if necessary. 1. 2. 3. 4. 10 7p 20 5p 1600 p1422 880 2p p. 2p. p Calculator Connections Correct Incorrect Section 2.6 Practice Exercises Study Skills Exercise A good technique for studying for a test is to choose four problems from each section of the chapter and write the problems along with the directions on 3 5 cards. On the back of each card, put the page number where you found that problem.Then shuffle the cards and test yourself on the procedure to solve each problem. If you find one that you do not know how to solve, look at the page number and do several of that type. Write four problems you would choose for this section. Review Exercises For Exercises 1–8, solve the equation. 1. 2. 312y 32 41y 12 7y 10 13w 42 51w 22 316w 82 10 1 2 1x 32 3 4 3 4 3. 4. 5 6 x 1 2 1 4 1x 42 3x 0.51y 22 0.3 0.4y 0.5 0.251500 x2 0.15x 75 5. 6. 7. 8. 8b 617 2b2 41b 12 2 51t 32 t 7t 16t 82
miller_beginning_intermediate_algebra_4e_ch1_3
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