Question

is the number -9·π rational or irrational? rational irrational submit

Explanation:

A rational number can be expressed as a fraction of two integers ($\frac{p}{q}$, $q
eq0$). $\pi$ is irrational (can't be expressed as such a fraction). Multiplying an irrational number ($\pi$) by a non - zero rational number ($- 9$) results in an irrational number. So $-9\cdot\pi$ is irrational.

Answer:

irrational