tl;dr: Andrea traveled 3 [tex]\frac{3}{4}[/tex] miles.
Hello!
To solve the problem, we need to understand what it means. The distance traveled in miles is represented with t, while the number of minutes is represented with m.
Now, first we need to fill in the equation with the information we're given.
t = 3m → t = 3(1 [tex]\frac{1}{4}[/tex])
Now, we solve for t.
t = 3(1 [tex]\frac{1}{4}[/tex]) → t = 3 [tex]\frac{3}{4}[/tex]
Andrea traveled 3 [tex]\frac{3}{4}[/tex] in an hour and 15 minutes.
Hope this was helpful. Have a great day! (★‿★)