Answer:
The value of e is -1 and f is -2.
Step-by-step explanation:
The steps are :
![2e - 3f = 4 - - - (1)](https://tex.z-dn.net/?f=2e%20-%203f%20%3D%204%20-%20%20-%20%20-%20%281%29)
![2e - 5f = 8 - - - (2)](https://tex.z-dn.net/?f=2e%20-%205f%20%3D%208%20-%20%20-%20%20-%20%282%29)
![2e - 3f - 2e - ( - 5f) = 4 - 8](https://tex.z-dn.net/?f=2e%20-%203f%20-%202e%20-%20%28%20-%205f%29%20%3D%204%20-%208)
![2f = - 4](https://tex.z-dn.net/?f=2f%20%3D%20%20-%204)
![f = - 4 \div 2](https://tex.z-dn.net/?f=f%20%3D%20%20-%204%20%5Cdiv%202)
![f = - 2](https://tex.z-dn.net/?f=f%20%3D%20%20-%202)
![substitute \: f = - 2 \: into \: (1)](https://tex.z-dn.net/?f=substitute%20%5C%3A%20f%20%3D%20%20-%202%20%20%5C%3A%20into%20%5C%3A%20%281%29)
![2e - 3( - 2) = 4](https://tex.z-dn.net/?f=2e%20-%203%28%20-%202%29%20%3D%204)
![2e + 6 = 4](https://tex.z-dn.net/?f=2e%20%2B%206%20%3D%20%20%204)
![2e = 4 - 6](https://tex.z-dn.net/?f=2e%20%3D%204%20-%206)
![2e = - 2](https://tex.z-dn.net/?f=2e%20%3D%20%20-%202)
![e = - 2 \div 2](https://tex.z-dn.net/?f=e%20%3D%20%20-%202%20%5Cdiv%202)
![e = - 1](https://tex.z-dn.net/?f=e%20%3D%20%20-%201)
I’ll read this later and try to help you!
Answer:
The measure of arc GE is ![25\°](https://tex.z-dn.net/?f=25%5C%C2%B0)
Step-by-step explanation:
we know that
The measurement of the external angle is the semi-difference of the arcs which comprises
In this problem
m<A is a external angle
so
![m](https://tex.z-dn.net/?f=m%3CA%3D%5Cfrac%7B1%7D%7B2%7D%28arc%5C%20CD-arc%5C%20GE%29)
substitute the values and solve for the measure of arc GE
![15\°=\frac{1}{2}(55\°-arc\ GE)](https://tex.z-dn.net/?f=15%5C%C2%B0%3D%5Cfrac%7B1%7D%7B2%7D%2855%5C%C2%B0-arc%5C%20GE%29)
![30\°=(55\°-arc\ GE)](https://tex.z-dn.net/?f=30%5C%C2%B0%3D%2855%5C%C2%B0-arc%5C%20GE%29)
![arc\ GE=55\°-30\°=25\°](https://tex.z-dn.net/?f=arc%5C%20GE%3D55%5C%C2%B0-30%5C%C2%B0%3D25%5C%C2%B0)