Answer:
4xy(2+y)
Step-by-step explanation:
Factor 4
x
y out of 8
x
y
.

Factor 4xy out of 
4xy(2) + 4xy(y)
Factor 4
x
y out of 4
x
y
(
2
) + 4
x
y
(
y
)
.
4xy(2+y)
hope this helps :)
No, because it is not per second. You would have to simplify to per one second for it to be a unit rate. Hope it helps! :)
I believe that the correct answer is binomial
Combine like terms and do the exponent first then for the decimals use a calculator