To find the total distance Wylie walks over 11 days, you can multiply the distance he walks each day by the number of days:
\[ \text{Total distance} = \text{Distance per day} \times \text{Number of days} \]
In this case:
\[ \text{Total distance} = \frac{9}{10} \text{ miles/day} \times 11 \text{ days} \]
Calculating this gives:
\[ \text{Total distance} = \frac{9 \times 11}{10} = \frac{99}{10} = 9.9 \text{ miles} \]
So, Wylie walks a total of 9.9 miles in 11 days.