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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

2. Writing Equations in Point-Slope Form

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Exercise 43 Page 176

The product of a number and its reciprocal is 1.

-7/2

Practice makes perfect

The product of any nonzero real number and its reciprocal is 1. x*1/x=1For a fraction, the reciprocal is the inverse of the fraction. x/y*y/x=1 Therefore, the reciprocal of - 27 is - 72. Let's check that this is true by calculating the product.

-2/7* (-7/2)? =1

MultNegNegOnePar

- a(- b)=a* b

2/7*7/2? =1

Multiply fractions

2* 7/7* 2? =1

Multiply

14/14? =1

a/a=1

1=1

We were able to confirm that the reciprocal of - 27 is - 72.

Subchapter links

Communicate Your Answer p.171

Monitoring Progress p.172-174

Exercises p.175-176