If the length of FH is 18 units, what is the value of x?

3

Step-by-step explanation:

FH is 4x + 2x.

4x + 2x = 18

6x = 18

Divide both sides by 6.

6x/6 = 18/6

x = 3

I hope this helps.

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c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

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.