Answer:
a) Who jogs faster?
Your friend jogs faster because he jogs with a speed of 10.91 km/hr
Step-by-step explanation:
Speed = Distance(km)/Time(hours)
Question 2 How much sooner will the faster jogger finish a five-kilometer race?
Your friend's will finish a 5km race at a speed of 18.18 km/hr
Your speed is :
You jog 2 kilometers in 12 minutes.
Convert 12 minutes to hours
60 minutes = 1 hour
12 minutes = x
x = 12/60
x = 1/5 hour
Your speed is calculated as:
2km/1/5hour
= 2 km ÷ 1/5 hour
= 2 × 5
= 10 km/hr
Your friend's speed is calculated as:
Your friend jogs 3 kilometers in 16.5 minutes.
Convert 16.5 minutes to hours
60 minutes = 1 hour
16.5 minutes = x
x = 16.5/60
x = 0.275 hour
Your speed is calculated as:
3km/0.275 hour
= 10.909090909 km/hr
Approximately = 10.91km/hr
a) Who jogs faster?
Your friend jogs faster because he jogs with a speed of 10.91 km/hr
Question 2 How much sooner will the faster jogger finish a five-kilometer race?
Your friend jogs faster, hence:
3 km = 10.91 km/hr
5km = x
x = 5 × 10.91/3
x = 18.183333333 km/hr
Your friend's will finish a 5km race at a speed of 18.18 km/hr
can assume any value, and usually an inequality presented like this has 
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