Answer:
when x= 1 then,
y = 1+6
= 7
for me line A will be better with straight line
a. Angles ABC and CBD are supplementary, so you know that 
The interior angles of any triangle sum to 180 degrees in measure, so that
.
By the law of sines, we then have

b. In triangle BCD, we have

and so

Step-by-step explanation:
X=e+r/d
swap both sides
e+r/d=x
subtract e from both sides
e-e+r/d=x-e
r/d=x-e
multiply d to both sides
d×r/d=x-e×d
r=x-e×d
Answer:
Step-by-step explanation:
Plug everything in
5-10-8=-13