Question

MATH HELP PLEASE

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)

Answer 1

If the angles are congruent then m∠ACB is 50°.
4x+4=6x-14
-4       -4
4=   2x-14
+14    +14
18=2x
x=9
Plug into one of the expressions.
4(9)+4
46+4
50
Sadly I do not know the scale factor rule yet. Just one lesson ahead :(
I hope I helped on first!