Step-by-step:
ANALYSIS:
From the question, we know that...
• 310m from his home to the meeting
• Average speed RETURNING: 7 mph LESS than the speed he went on
• Total time = 12 hours
• Rate of speed = ?
-Round off to the nearest TENTH-
Step-by-step explanation:
Speed = Distance / Time
• S = 310/12
• S = 25.83333... mph
• S = 25.83 (round off)
Then it says that speed returning is -7 from the speed he went on, so...
• 25.83 - 7 = 18.83 mph
Rounding off to the nearest TENTH:
18.83 = 18.8 mph
Final Answer : 18.8 mph