Answer:
-0.01
Step-by-step explanation:
It would be 9 + x =16
To solve it, subtract 9 from both sides of the equal sign
So (9+x)-9=16-9
Which is x=7, so the answer is 7.
The rate of this would be 11 sit ups because 55 divided by 5 would give you the answer 11
Step-by-step explanation:

therefore, 9 students haven't given their speech