Explanation
Given that Chris pays a monthly fee of $21 and pays an additional $0.05 per minute of use. The least he has been charged in a month is $84.35.
Based on this, we can have the equation below;
[tex]\begin{gathered} 0.05m+21\ge84.35 \\ \end{gathered}[/tex]
We can solve for m
[tex]\begin{gathered} 0.05m\ge84.35-21 \\ 0.05m\ge63.35 \\ m\ge\frac{63.35}{0.05} \\ m\ge1267 \end{gathered}[/tex]
Answer:
[tex]m\ge1267[/tex]
