6 is the least common denominator
The answer is 75 as you would divide 45 by 0.6
For the answer to the question above, the power of "y" doesn't influence descending order for x even if it is higher than power of x.
Unordered polynomial is
7x3y3 + 4 - 11x5y2 - 3x2y
Polynomial in descending order looks like this
-11x5y2 + 7x3y3 - 3x2y + 4
Degree of the second term is 5 ( because of x5 )
Answer: You get to keep 1,673.24
You pay 272.38 in taxes.