7x+3+5x²
ax²+bx+c
5x²+7x+3
Hoped this helped!
Not sure what you mean by 5th term, I assume it's the term with the form x^3y^5
Then, you can use combination method:
C(8,3) * (-3)^5 = -13608
So, 5th term is -13608x^3y^5
Answer:
I think its 4,5. Not entirely sure but it makes sense
Mean, or average.
The mean is 5.625