What is the area of the regular octagon below with a side of 8 in.? round to the nearest tenth. 443.4 in^2 618.0 in^2 221.7 in^2 309.0 in^2

309.00 is your answer hope this helps

Paralell to the line means has same slope
I happend to know that if you have 2 equations
ax+by=c and
dx+ey=f
if a=d and b=e, then the lines ar paralell

since it is paralell
the equation looks like this
7x+y=c

so
(1,-3)
(x,y)
sub those to find the c
7(1)+(-3)=c
7-3=c
4=c

the equation is 7x+y=4