Try the last one; it doesn't mention anything foreign.
7/9-1/3 or 7/9-3/9= 4/9 is the answer
Average speed = 
Ishan's Speed uphill = 10mph
Time taken = 18 minutes = 18/60 = 3/10 hours
Now distance = rate × time
Distance traveled by Ishaan up hill = 10 × 3/10 = 3 miles
Now returning back home
Distance = 3 miles
Rate = 30 mph
So time taken = distance/ rate = 3/30= 1/10 hours = 1/10 ×60 = 6 minutes.
Now total distance traveled = 3 + 3 = 6 miles
Total time taken = 18 + 6 = 24 minutes = 24/60 = 2/5 hours
Average speed
= 
= 15 mph
Ishaan's average speed for the entire trip from home to the gift store and back is 15mph
Answer:
$40.50 for the miles and 1.75 x P (passangers)
Step-by-step explanation:
Since $2.25 is the fee for miles, 2.25 x 18 = $40.50
and since it depends on the group, ima say its probably 3, the passenger fee would be $5.25
that would add up to about $45.75
but if there is a different amount of passengers, just multiply it by $1.75 then add it to $40.50!
I'm guessing you want to know how much is in one case,
36/3 = 12