Whoever can give me the answers the fastest gets all 10 points. The have to be right!!!?

Question

Use cross products to determine whether each pair of ratios form a proportion.

1.) 4/9, 12,27

2.) 5/6, 25/36

3.) 5/12, 7/18

4.) 2/7, 16,56

5.) 3/14, 9/42

6.) 3/4, 18/24

7.) 20/32, 5/8

8.) 21/40, 3/5

PLZ MAKE SURE ALL OF THEM ARE CORRECT!!!!!! i ALSO WANT TO KNOW HOW YOU GOT YOUR ANSWERS!!!!!!!!!!!!!

Answer 1

I can understand if you're posting a hard problem on here, but this?! Seriously, don't be lazy these are super easy and not time consuming at all! I'll tell you how to do it though, you need to learn yourself and practice for the test:

Cross multiply so 4/9=12/27

so 4 times 27= ?

and

9 times 12 =?

If you get the same answer for each, then they form a proportion.

Answer 2

check if they match... divide one by each other (exmaple 1: 4/9 = ? and then do 12/27 = ?, if the results differ there isn't a proportion, if the results are equal they do have a proportion)