Questions. If $\frac{-5}{9}$ is the additive inverse of $\frac{5}{\mathrm{p}}$, then what is the value of p ?

1. 9
2. 5
3. 1
4. 7

Solution:
The correct option is 1
The additive inverse of a number X is -X.
For example, additive inverse of:-
$\frac{-5}{9}$ is $\frac{5}{9}$
Comparing this with $\frac{5}{\mathrm{p}}$, we have
$\mathrm{p}=9$