I need help 20 points

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Which linear inequality is represented by the graph?

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)