It depends on where you are....
Answer:
2a+5b
Step-by-step explanation:
7a-5a =2a
-2b+7b = 5b
Salutations!
12

- 9

=
Then,
- 9

-

Next, our final answer:
=

= 2
Our decimal would be 2.916667
Hopefully This Helps!!!
Answer:
Study of the collection, organization, analysis, interpretation, and presentation of data
Step-by-step explanation: