-2n(5 + n - 8 - 3n)
-10n - 2n² + 16n + 6n²
4n² + 6n
The answer is

In the choices; the coefficients 21, 32 and 10 are not perfect squares.
Answer:
9:30am
Step-by-step explanation:
Given data
Start time= 8:20am
Folding time= 25min
Time spent on Puzzle= 45min
Total time = 25+45= 70min= 1:10 min
Therefore the time she finishes is
8:20+ 1:10= 9:30 am
Hence she finished by 9:30am