Answer :
[tex]add \ all\ distances:\\\\
1\frac{3}{4}+1\frac{3}{8}+\frac{1}{2}=\ \ \ | make\ a\ common \ denominator\\\\
1\frac{6}{8}+1\frac{3}{8}+\frac{4}{8}=1\frac{13}{8}=2\frac{5}{8}miles\\\\ She\ hiked\ 2\frac{5}{8}miles[/tex]