Shelly biked 21 miles in 4 hours. a.what is shelly's average speed in miles per hour?

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )

im guessing (23,14). hope this : )