Find the median of the data. 10, 9, 12, 7, 5, 7

X+ y = 5 ; x - y =3 solve using linear combination

Which inequality has a dashed boundary line when graphed ?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.