[tex](3.5\times6\times3)\text{ + (}\frac{1}{2}\times3.5\times4)[/tex]
Here, we want to find the total number of miles Hailey walked last month
We have two parts here
Initially, 6 hours per week for 3 weeks
The number of miles walked here at 3.5 miles per hour is;
[tex](3.5\times6\times3)[/tex]
Secondly, we have the second as 4 hours in a week at a rate that is one-half the regular
One-half the regular is;
[tex]\begin{gathered} \frac{1}{2}\times3.5 \\ \\ \text{That gives;} \\ (\frac{1}{2}\times3.5\times4) \end{gathered}[/tex]
So, we have the total as;
[tex](3.5\times6\times3)\text{ + (}\frac{1}{2}\times3.5\times4)[/tex]