Abc has vertices a(1,5), b(9,7),and c (7.13). m is the midpoint of ab. and n is the midpoint of bc. which of the following is the length of mn? a. 3 b. 4 c. 5 d. 6

With number 11 ( show how you got the answer)

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.