Posted by Vanilla Bear on .
Find the multiplicative inverse of the number.
9
Please explain and give steps as well. Thank you.

Algebra I 
Reiny,
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,
oh okay but what about fractions and mixed numbers?

Algebra I 
Reiny,
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,
Oh okay, i see thank you!