I tried doing these, but I always got the wrong answer or just got stuck on one part.

1.Resolve algebraically

I have absolutely no clue on how to start with this one.

2.

I squared both sides, but it kept getting more and more complicated and really confused me.

3.Determine the coordinates of the intersection points between the line and the circle

I tried substituting the line into the circle equation, but than I didn't know where to go from there.

Thanks guys.