Answer:
a) m/4 miles per hour
b) 7m/12 miles per hour
Step-by-step explanation:
Mathematically, at any point in time;
Time = distance/speed
The distance here at any point is m mph
a) For the time spent walking home
Time = m/4 miles per hour
b) We add the time walking to the friend’s house and the time that it took to walk home
That would be;
m/4 + m/3 = 7m/12 miles per hour