Yesterday 170 guests at a hotel called for room service , and 255 guests did not call for room service . What percentage of the guests at this hotel called for room service yesterday ?

40%

Step-by-step explanation:

add both numbers together to get the total amount of guests

170 + 255 = 425

divide the number of guests who called for room service by the total guests

170 ÷ 425 = 0.4

convert the decimal to a percentage

0.4 = 40%

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

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.