There are 9 numbers written, beginning with: 8, 5, 4, 9, 1, ... Finish the sequence.

14    -50    -29    -541

Step-by-step explanation:

8-3=5-1=4+5=9-8=1+13=14-64=-50+21=-29-512=-541  

i got this by looking up sequence pattern finder in google and clicking on the second option then inserting the numbers you gave hope this helps

13

step-by-step explanation:

distance formula is d=√(x2-x1)^2   +   (y2-y1)^2