HELP PLEASE

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

17 in long 1.3 ft wide and 8in high what is the volume

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)