20 square yards. 15 * 12 is 180 and then you divide it by 9 which gives you 20 square yards. 9 square feet are equivalent to a square yard.
You could say one person is at 1:5 and say they moved up and up
Answer:

Step-by-step explanation:
First, distribute the -2 to the rest of the parenthesis, following PEMDAS.

Then, add -6a to both sides.

Now, you can divide both sides by 2 to isolate b.

Divide to simplify.

Answer:
1/3
Step-by-step explanation:
The answer is .005 because five out of one thousand need to be replaced.