To find f(-20), first figure out which piece x = -20 fits with.
Since -20 < -12, x = -20 first in the domain used by the third piece.
For f(-20), treat this function as if it was just f(x) = 3x-7.
f(-20) = 3(-20) -7
= -60 - 7
= -67
Answer:
AC and BD are vertically oposite
and both sides are equal (equilateral) so AC = BD
As i think
I'm guessing this is what the question is asking?
Answer:

Step-by-step explanation:
Given,

To find the quotient, apply the division rule of exponents, 
Thus:

= 