Answer
a. $\frac{1}{11}$
b .$\frac{-1}{9}$
c. $\frac{4}{7}$
Work Step by Step
11a.
The reciprocal of 11, or $\frac{11}{1}$ is $\frac{1}{11}$
11b
The reciprocal of -9, or $\frac{-9}{1}$ is $\frac{-1}{9}$
11c
The reciprocal of $\frac{7}{4}$ is $\frac{4}{7}$