Answer:
8p - 1
Step-by-step explanation:
one less than = - 1
than 8 times p = 8p
put it together= 8p - 1
The distance between points
and
can be calculated using formula

1.

2.

3.

Then

Answer: correct choice is C.
Step-by-step explanation:
the answer is:
x=180-90-70=20°