Answer:
7.5 miles per hour
Step-by-step explanation:
Average Speed = Total Distance/Total Time
= 7.5 miles/hour
Answer from Gauthmath
Answer:28.26
Step-by-step explanation:9 x 3.14
Let
x-------> the length side of the original cube
we have

Divide by
both sides

The system of equations is equal to
--------> equation 
--------> equation 
using a graphing tool
see the attached figure
we know that
the solution of the system of equations is the intersection both graphs
therefore
the solution is

therefore
<u>the answer is</u>

I believe the answer is x^2-4x+1
(I did the problem in my head but it seems correct)