How do you do this and what's the answer? explain plz.

We are given that T = test score, and x = # of hours studied. We are given the same information in numbers:

T = 90

x = 6

y = ?

We need to figure out y in terms of k. Let's set up what we know:

Let's multiply both sides by y to get rid of it on the right side:

Now, let's divide by 90 on both sides to get rid of it from the left side (and solve for y):

Your answer is A! If any part didn't make sense, you know where to reach me.

Givens

Number of hours she studies = x = 6

Number of classes she misses = y

Test score = T = 90

Equation

T = x/(ky)

General Equation

Solve for y before you do anything else.

Multiply the entire equation by ky

T*ky = x Divide Both sides by Tk

y *kT/kT = x / (Tk)

y = x / kT

Now put the numbers in

y = 6 / k*90

That looks pretty much like A. doesn't it?

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.