Math
1. the m∠acd = (4x + 4)° and m∠abd = (6x - 14)°. find m∠acd.
2. if triangle abc defined by the coordinates a(1, 1), b(9, 1), c(1, 9) is dilated by a scale factor of 1/2, with resulting vertex b' at (5, 1), what is the center of the dilation?
a) (0, 0)
b) (1, 1)
c) (-2, -2)
d) (-1, -1)