Answer:
The velocity is 8.93 meters/second.
Step-by-step explanation:
It is given that Elena runs for 28 seconds and finishes at 250 meters.
Here the displacement is 250 meters and the time is 28 seconds.
We know that 
Substitute displacement = 250 and time = 28 in above formula.

meters/second
Hence, the velocity is 8.93 meters/second.
Idk use a calculator to find the sum of the answer
Answer:
-7
Step-by-step explanation:

it is possible because x is just a letter representing the unknown nos
Answer:
63 cause there equal
Step-by-step explanation: