Posted by Vanilla Bear on Wednesday, September 5, 2012 at 10:26pm.
Find the multiplicative inverse of the number.
9
Please explain and give steps as well. Thank you.

Algebra I  Reiny, Wednesday, September 5, 2012 at 10:39pm
The multiplicative inverse of the number is that number which when multiplied gives you 1
so (?)(9) = 1
must be 1/9

Algebra I  Vanilla Bear, Wednesday, September 5, 2012 at 10:42pm
oh okay but what about fractions and mixed numbers?

Algebra I  Reiny, Wednesday, September 5, 2012 at 11:10pm
To form the multiplicative inverse of a fraction , simply take its reciprocal,
e.g. for 4/7 , its xinverse is 7/4
(4/7)(7/4) = 28/28 = 1
To form the multiplicative inverse of a mixed fraction, change the mixed fraction to an improper fraction and proceed as above
e.g. 4 3/5
= 23/5
so the xinverse is 5/23

Algebra I  Vanilla Bear, Wednesday, September 5, 2012 at 11:11pm
Oh okay, i see thank you!
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