9x + 9x − 21 = 33
Please solve C:

Answer and Step-by-step explanation:

For this equation, solve for x.

Combine like terms.

18x - 21 = 33

Add 21 to both sides of the equation.

18x = 54

Divide both side of the equation by 18.

x = 3

x = 3 is the answer.

#teamtrees #PAW (Plant And Water)

you probably already have the answer but anyways it's b. 15.0

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.