Answer :
You know that she runs 4 miles every day, so we can set up the equation:
[tex]\sf m=4d[/tex]
For any given day you just plug that number in for 'd' and it will give you the total number of miles.
[tex]\sf m=4d[/tex]
For any given day you just plug that number in for 'd' and it will give you the total number of miles.