Answer:
The Order of operations is PEMDAS: Parentheces, Exponents, Multiplcation, Division, Addition, Subtraction
Step-by-step explanation:

Option A is not correct because it equals 9.
Option B is not correct because it equals -66
Option C is CORRECT because it equals 3 that is your ANSWER
Option D is not correct because it equals 0
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Answer:
34%
Step-by-step explanation:
100%=2.45
? =3.29
3.29/2.45×100=134.29
134.29-100=34%
Group like terms
1.7m^2+2.5m^2-4n-n+6.5
4.2m^2-5n+6.5