-2x(-4)=8x
-9(-4)=36
8x+36 is the answer
Answer: 
Step-by-step explanation:
In order to find the value of "x", it is important to remember that:

We can identify in the figure that:

Then:

Solving for AB:

Now, since there are 360° in a circle, we know that:

Then we can substitute
into
and solve for "x". This is:

Answer:
DC
Step-by-step explanation:
ABCDE ≅ GHJDF
GH ≈ AB
DJ ≈ DC
Log (5) + log (3) = log (15)