3 (k-12) = k-30
3k - 36 = k - 30
3k - k = -30 + 36
2k = 6
k = 3
Answer:
9
Step-by-step explanation:
Since the point lies of the negative side of the x axis, it forms an angle of 180° with the positive direction of the x axis.
So, if we start from (1,0), a rotation of 180° will bring us to (-1,0). If we scale the point with factor 3, we have (-3,0).
So, the polar coordinates are (3, 180°)
C I think I hope it helps