Answer:
275 days
Step-by-step explanation:
From August 21 to May 23, there is 275 days!
The given expression is :
2xx+3-5(x-2)
We know that, 

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.
The answer is true because 18 is bigger then 15