Work this out for me thanks

Aline has a slope of . which ordered pairs could be points on a parallel line? check all that apply. (-8, 8) and (2, 2) (-5, -1) and (0, 2) (-3, 6) and (6, -9) (-2, 1) and (3,-2) (0, 2) and (5,5)

What is the simplified form of square root of 400 to the 100th power ?

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.