The variable A would most likely be your "independent variable."
This is just standard convention. Nothing is really saying that your independent variable can not be on your Y axis; it is just widely accepted to put your changing variable on the x and your dependent variable on the y axis.
The answer would be 2400 square feet 60*40 = 2400
Hey there!☺
![Answer:\boxed{w=9}](https://tex.z-dn.net/?f=Answer%3A%5Cboxed%7Bw%3D9%7D)
![Explanation:](https://tex.z-dn.net/?f=Explanation%3A)
![6+(w-10)=5](https://tex.z-dn.net/?f=6%2B%28w-10%29%3D5)
In our first step, we will simplify both sides of the equation:
![6+w+-10=5](https://tex.z-dn.net/?f=6%2Bw%2B-10%3D5)
Now combine like terms:
![(w)+(6+-10)=5](https://tex.z-dn.net/?f=%28w%29%2B%286%2B-10%29%3D5)
Now continue simplifying:
![w+-4=10\\w-4=5](https://tex.z-dn.net/?f=w%2B-4%3D10%5C%5Cw-4%3D5)
Now add 4 to both sides:
![w-4+4=5+4\\w=9](https://tex.z-dn.net/?f=w-4%2B4%3D5%2B4%5C%5Cw%3D9)
w=9 is your answer.
Hope this helps!☺
Step 1: equation--- 154=12(x)
Step 2: 154/12
Answer 12.833333333