How to use the absolute value function to translate each of the following statements into a single inequality.
(a) $\ x ∈ (-4,10) $
(b) $\ x ∈ (-\infty,2] \cup[9,\infty) $
I think in the first one the absolute value of $\ x$ should be greater than 4 and less than 10. is that correct? because the distance from $\ x$ to $\ 0$ should be between $\ 4$ and$\ 10$ in order for $\ x$ to belong in this interval.