K so the chance is 15/20 or 3/4 or 75%
Hope that helped :) if u dont get it i can try to explain :)
I think the answer is C hope this helps.
If all the points have the signs reversed, therefore this
means that the whole line is reflected about an axis. Since all are reflected
therefore this further means that the new points are still collinear.
We can prove this by plotting the points:
P’(6,2), Q(5,-2), R(4,-6)
<span>From the graph, they are in 1 line hence collinear.</span>
We must find the common ratio first...
Since a(n)=ar^(n-1)
-3359232=12r^7
-279936=r^7
-279936^(1/7)=r
-6=r
So our geometric sequence is:
a(n)=12(-6)^(n-1)
And the sum of a geometric sequence is:
s(n)=a(1-r^n)/(1-r), since a=12, r=-6, and n=8 we have:
s(8)=12(1-(-6)^8)/(1--6)
s(8)=12(1-(-6)^8)/7
s(8)= -2,879,340