Answer:
48/5 miles
Explanation:
First, we need to convert the mixed number 2 2/5 into a fraction as follows:
[tex]\begin{gathered} A\frac{b}{c}=\frac{(A\times c)+b}{c} \\ 2\frac{2}{5}=\frac{(2\times5)+2}{5}=\frac{10+2}{5}=\frac{12}{5} \end{gathered}[/tex]Therefore, Tracy walked her dog 12/5 miles.
Then, Maria walked her dog 3 times as far, so Maria walked her dog:
[tex]3\times\frac{12}{5}=\frac{3\times12}{5}=\frac{36}{5}[/tex]So, Maria walked her dog 36/5 miles.
Now, both girls walk their dogs a total of:
[tex]\frac{12}{5}+\frac{36}{5}=\frac{12+36}{5}=\frac{48}{5}[/tex]So, the answer is 48/5 miles.