Posted by gt on .
robby runs for 5 minutes . he walks for 10 minutes . he runs for 7 minutes. he walks another 4 minutes .he runs again for 8 minutes and walk againfor 3 minutes .what is the range of minutes robby runs?

math 
Ms. Sue,
5, 7, 8
8  5 = ?
http://www.purplemath.com/modules/meanmode.htm