Answer:
![m = -\frac{4}{3}](https://tex.z-dn.net/?f=m%20%3D%20-%5Cfrac%7B4%7D%7B3%7D)
Step-by-step explanation:
![2m = -\frac{2}{3}](https://tex.z-dn.net/?f=2m%20%3D%20-%5Cfrac%7B2%7D%7B3%7D)
Divide both sides by 2 to get just m
![\frac{2m}{2} = \frac{-\frac{2}{3}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B2m%7D%7B2%7D%20%3D%20%5Cfrac%7B-%5Cfrac%7B2%7D%7B3%7D%7D%7B2%7D)
You can't divide a fraction by a number so you do kcf (keep it, change it, flip it)
![m = -\frac{2}{3} x \frac{2}{1}](https://tex.z-dn.net/?f=m%20%3D%20-%5Cfrac%7B2%7D%7B3%7D%20x%20%5Cfrac%7B2%7D%7B1%7D)
![m = -\frac{4}{3}](https://tex.z-dn.net/?f=m%20%3D%20-%5Cfrac%7B4%7D%7B3%7D)
I'll help on 12. You know that 5*5 is 25. therefore what times 5 equals 20?
4(5x-20)=-20
20x-80=-20
20x=60
x=3
Answer:
rectangle
Step-by-step explanation: