Answer:
![y = 15](https://tex.z-dn.net/?f=y%20%3D%2015)
![AC = 24](https://tex.z-dn.net/?f=AC%20%3D%2024)
![DC = 12](https://tex.z-dn.net/?f=DC%20%3D%2012)
Step-by-step explanation:
Given
![AD = 12](https://tex.z-dn.net/?f=AD%20%3D%2012)
![AC = 4y - 36](https://tex.z-dn.net/?f=AC%20%3D%204y%20-%2036)
See attachment
Solving for y
From the attachment:
![AD = DC](https://tex.z-dn.net/?f=AD%20%3D%20DC)
and
![AC = AD + DC](https://tex.z-dn.net/?f=AC%20%3D%20AD%20%2B%20DC)
Substitute DC for AD
![AC = AD + AD](https://tex.z-dn.net/?f=AC%20%3D%20AD%20%2B%20AD)
![AC = 2AD](https://tex.z-dn.net/?f=AC%20%3D%202AD)
Substitute values for AD and AC
![4y - 36= 2*12](https://tex.z-dn.net/?f=4y%20-%2036%3D%202%2A12)
![4y - 36= 24](https://tex.z-dn.net/?f=4y%20-%2036%3D%2024)
Collect Like Terms
![4y = 36+ 24](https://tex.z-dn.net/?f=4y%20%3D%2036%2B%2024)
![4y = 60](https://tex.z-dn.net/?f=4y%20%3D%2060)
Solve for y
![y = 60/4](https://tex.z-dn.net/?f=y%20%3D%2060%2F4)
![y = 15](https://tex.z-dn.net/?f=y%20%3D%2015)
![AC = 4y - 36](https://tex.z-dn.net/?f=AC%20%3D%204y%20-%2036)
![AC = 4 * 15 - 36](https://tex.z-dn.net/?f=AC%20%3D%204%20%2A%2015%20-%2036)
![AC = 24](https://tex.z-dn.net/?f=AC%20%3D%2024)
![AD = DC](https://tex.z-dn.net/?f=AD%20%3D%20DC)
![DC = AD](https://tex.z-dn.net/?f=DC%20%3D%20AD)
![DC = 12](https://tex.z-dn.net/?f=DC%20%3D%2012)
Answer:
y = 100
we have: y + 135 + 140 + 150 + 120 + 135 + 120 = 180.5
=> y = 100
Answer:
$66.70
Step-by-step explanation:
58x.15= 8.70
8.70+58= 66.70