Given sinX= -12/13 and 270º < X < 360° what is the exact value of cos2X?

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Are the corresponding angles congruent? explain why or why not.

Jared had 3/7 of the minutes on a family phone plan remaining for the month. the plan is shared by 2 people. if divided equally what portion of the minutes remaining on the phone plan would be avalible for each person