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Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
8. An Introduction to Equations
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Exercise 45 Page 57

Use mental math to guess the starting value for the table.

8

Practice makes perfect

We want to use a table to solve the given equation. 1/2x-5=-1 In order to choose a good starting point for our table, let's pretend that the equation is 12x=-1. What multiplied by 12 would get us close to -1? 10 would be good, so let's try that in our table. We should also try two digits less and two digits greater, just to be on the safe side.

x 1/2x-5 =
8 1/2( 8)-5 -1
9 1/2( 9)-5 -1/2
10 1/2( 10)-5 0
11 1/2( 11)-5 1/2
12 1/2( 12)-5 1

We can see that x=8 is the solution to our equation.

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arrow_right Lesson Check p.56
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arrow_right Practice and Problem-Solving Exercises p.56-58
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Practice and Problem-Solving Exercises 8 (Page 56)
Practice and Problem-Solving Exercises 9 (Page 56)
Practice and Problem-Solving Exercises 10 (Page 56)
Practice and Problem-Solving Exercises 11 (Page 56)
Practice and Problem-Solving Exercises 12 (Page 56)
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Practice and Problem-Solving Exercises 29 (Page 56)
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Practice and Problem-Solving Exercises 39 (Page 57)
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Practice and Problem-Solving Exercises 45 (Page 57)
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Practice and Problem-Solving Exercises 47 (Page 57)
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Practice and Problem-Solving Exercises 64 (Page 57)
Practice and Problem-Solving Exercises 65 (Page 58)
Practice and Problem-Solving Exercises 66 (Page 58)
arrow_right Standardized Test Prep p.58
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arrow_right Mixed Review p.58
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Mixed Review 83 (Page 58)
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