We need a picture im guessing
The formula to find speed:

We first need to find the distance to gift store:
18/60 × 10
=3miles
We can then find the time he used down hill:
3÷30×60
=0.1×60
=6 minutes
In total he walked:
3x2
=6miles
We can then find his average speed by dividing the distance by total time used:
=6÷(6+18)/60
=6÷24/60
=15mph
The answer is 15mph.
Hope it helps!
They can both be divided by 2, so you would divide 4 by 2 which is 2 and then 6 by 2 which is 3. it simplifies to 2/3
Answer:
Assuming each class is filled to capacity, the average class size is 70.
Step-by-step explanation:
We have to find the weighted average of the number of students.
The weights are the number of classes.
We have that:
One class of 20 students
Eight classes of 60 students.
One class of 80 students.
Four classes of 100 students.
So

Assuming each class is filled to capacity, the average class size is 70.
-3.1,-3,-2.9,-2.8,-2.7,-2.6,-2.5,-2.4,-2.3