The distance walked together, is the sum of their distances.
Molly walked 1.37 miles farther than her brother and sister
The given parameters are:
[tex]\mathbf{Molly = 3.45\ miles}[/tex]
[tex]\mathbf{Sister = 1.23\ miles}[/tex]
[tex]\mathbf{Brother = 0.85\ miles}[/tex]
The combined distance walked by her brother and her sister is:
[tex]\mathbf{Both = Sister + Brother}[/tex]
Substitute known values
[tex]\mathbf{Both =1.23\ miles + 0.85\ miles}[/tex]
Evaluate like terms
[tex]\mathbf{Both =2.08\ miles}[/tex]
The distance Molly walked farther is calculated as follows:
[tex]\mathbf{Farther = Molly - Both}[/tex]
Substitute known values
[tex]\mathbf{Farther = 3.45\ miles - 2.08\ miles}[/tex]
Evaluate like terms
[tex]\mathbf{Farther = 1.37\ miles}[/tex]
Hence, Molly walked 1.37 miles farther than her brother and sister combined
Read more about distance at:
https://brainly.com/question/2060552
