Answer:
9
Step-by-step explanation:
Angles should be equal
It will take them 12 minutes because 30-20=10 however you add the time of annoyance on therefore making it 12 minutes
After factoring
the solutions are x=0 , x=3, x= -3
Step-by-step explanation:
We need to solve by factoring:

Solving:

Taking 3x common:

Now using formula 


So, After factoring
the solutions are x=0 , x=3, x= -3
Keywords: Factorization
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