What is the value of x 1) 18 2) 22.5 3) 30 4) 54

x = 30 (choice 3)

To get this answer, you set the two expressions equal to one another, then you isolate x. Recall that vertical angles are congruent.

x+90 = 4x

x+90-x = 4x-x subtract x from both sides

90 = 3x

3x = 90

3x/3 = 90/3 ... divide both sides by 3

x = 30

Now let's check the answer

x+90 = 4x

30+90 = 4*30 ... replace every x with 30

120 = 120

The last equation is true so the answer is confirmed.

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

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.