Ryan and khalil each have their own savings. together, they borrowed $72 from a friend to buy a gift for their coach. each has to pay back an equal amount to their friend. ryan also owes the friend $12. which explains whether the equation below represents the debt that ryan owes his friend?

a. it represents the debt because each one owes $36, and ryan owes an additional $12.

b. it represents the debt because ryan has to pay back $36 and he will get back $12.

c. it does not represent the debt because paying back $12 means that –12 is added, so the result is not –48.

d. it does not represent the debt because the result should be a positive number since a dollar amount cannot be negative.

The answer is a

Step-by-step explanation:

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

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.