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ANSWER
Step 3
EXPLANATION
The given polynomial expression is:

Fatau correctly expanded the parenthesis in the first step.

Fatau also correctly grouped the like terms to obtain:

Fatau committed a mistake at the third step.
Instead of obtaining,

He mistakenly got:

Answer:
-8n-1
Step-by-step explanation:
n-1-9n=n-9n-1=-8n-1
Answer:
the correct answer is supposed to be 120, your almost there :)
Step-by-step explanation:
The answer is no. of men : no. of women= 7:3