Simplify, no negative
exponents.
-40x²y
-8x²y

5x^5

y^4

Step-by-step explanation:

-40 ÷ -8 = 5. Then subtract x to the 2nd from x to the 7th, which is x to the 5th. And once you do the same with y, you get y to -4. But since there can't be any negative exponents, you bring that down, giving you the final answer.

the correct is answer is a 9-sided polygon!

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.