the principal of a local middle school arranged for 5 buses to take 140 students on a field trip. of the 5 buses, 4 buses were completely full. only 12 students rode on the 5th bus. if b represents the maximum number of students who can ride on each bus, which equation can you use to find the value of b?

a) b+12=140

b)140-12b=4

c)4b+12=140

d)140+4b=12

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.  

1/2*qr*rs

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

step-by-step explanation:

is their an equation anywhere i can take a   look at it and see if i am right.