Four points are always coplanar if they:

B

Step-by-step explanation:

Step-by-step explanation:

these look easy you can probably just type it into a calculator, just show your work.

not sure where you got 20 from on the first problem it should be 9/12 I think, based on the examples at the top of the page.

1. 9/12

2. 16/22

3. 30/36

4. 28/44

5. 45/55

6. 50/60

The "/" indicates division btw and or fraction

then do the #x#x#x#x# thing you were doing