Answer:

Step-by-step explanation:

The two fraction have the same denominator , so put them under a common denominator

Simplify
-7-4=-11

write in mixed fraction form

Answer:
10/9
Step-by-step explanation:
average rate of change in 0≤x≤9
=(3-(-7))/(9-0)=10/9
Answer:
once
Step-by-step explanation:
30-19=11
Answer:
She is at least 51. She could be older.
I added you :) I hope you don’t mind