The endpoints of AB(Line segment) are A(1,2) and B(7,8). Find the coordinates of the midpoint M.

Is the figure congruent? yes or no?

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.

Find the domain and range of the following function f(x) = 51x - 21+ 4