Last one... hehe- sorry

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]

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

How can you find the mean absolute deviation (mad) for this set of data?