7.
a holiday meal cost $12.50 a person plus a delivery fee of $30.
which equation represents the amount a holiday meal
costs(y), including delivery, for x people?

Step-by-step explanation:

We are given the following information in the question:

Cost of a holiday meal = $12.50

Delivery fee = $30

Cost(y) represents the amount a holiday meal including delivery for x people.

Putting all the values,

The above equation gives the total amount of holiday meal for x people including the delivery charges.

2

step-by-2step 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.