The answer to 11 is perpendicular and the answer to 12 is parallel but I want to know how to get to that answer

11.

10x+4y=-4 as y=Mx+b.      y=−5/2x−1

8x-20y=60 as y=Mx+b.   y=2/5x−3

12.

x-y=9       y=x-9

7x+7y=35.    Y=-x+5

Step-by-step explanation:

da freeck kinda math is this just drop out

step-by-step explanation:

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.