So we know the center of the circle is at 0,0, what's the radius?
well, the radius is the distance from the center to any point on the circle, it just so happen that -1, 3 is on it, so then
The answer to #5 is 171
The answer to #6 is -344
Y=x-1
y=6x+4
im not sure about the second one
Since the diagonals of a rhombus intersect to form right angles, this means that angle ACE is 26 degrees. Since CE is the angle bisector of ACD, this means that ACD is 26 x 2 = 52 degrees. The diagonals are angle bisectors to the opposite corners, so ACD = ACB = 52 degrees, and BCD = 52 x 2 = 104 degrees. For a rhombus, opposite angles are equivalent, so BAD = BCD = 104 degrees.
Repost your question. There is clearly a typo on the right side.