What is the midpoint of -4 and 20?

In one dimensions (i.e. with standard numbers and not points with more coordinates) the midpoint is the same as the average.

The average of two numbers is their sum divided by two.

So, we have -4+20=16. Divide this by two to get 8.

8

Step-by-step explanation: 4+20=24

24/2= 12

-4+12 = 8

687.09 dollars       happy now

step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1