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Pearson Algebra 1 Common Core, 2011

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Pearson Algebra 1 Common Core, 2011 View details

1. Inequalities and Their Graphs

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Exercise 74 Page 170

What happens when you divide a negative number by a positive number?

- 3

Practice makes perfect

Let's begin by rewriting the division as a fraction. -3.9÷1.3 ⇒ -3.9/1.3Notice that the numerator and denominator have opposite signs. Because the quotient of a negative number and a positive number is always negative, we can move the negative sign in front of the fraction. -3.9/1.3 = - 3.9/1.3 Now, we can rewrite -3.9 as - 1.3* 3 to help us further simplify the quotient.

- 3.9/1.3

SplitIntoFactors

Split into factors

- 1.3* 3/1.3

a/b=.a /1.3./.b /1.3.

- 1* 3/1

a * 1=a

- 3/1

a/1=a

- 3

Subchapter links

Lesson Check p.167

Practice and Problem-Solving Exercises p.168-170

Standardized Test Prep p.170

Mixed Review p.170