Answer:
approximately 42.05
Step-by-step explanation:
We know that the distance formula is
, so if we use (3,8) as point 2 and (21, -30) as point 1 (note that these are interchangeable), we know that
x₂=3
y₂=8
x₁=21
y₁=-30
Then, we can plug it into the formula to get 
Answer:
maybe you should add the question and someone could help you out
Step-by-step explanation:
-_-
\
(7/3 *3sqrt27-2)*1/5 +sqrt(81)
answer = 10
The answer is x=8 or x=-13