Answer:
The length of EF = x = 18 cm
Option A is correct.
Step-by-step explanation:
Ware given perimeter of triangle = 97 cm
We need to find length of EF = x = ?
The length of EG = x+7
The length of EF = x
The length of GF = 3x
The formula used is: ![Periemter \ of \ triangle= Sum \ of \ all \ sides \ of \ triangle](https://tex.z-dn.net/?f=Periemter%20%5C%20of%20%5C%20triangle%3D%20Sum%20%5C%20of%20%5C%20all%20%5C%20sides%20%5C%20of%20%5C%20triangle)
Putting values and finding x i.e length of EF
![Periemter \ of \ triangle= Sum \ of \ all \ sides \ of \ triangle\\97=x+7+x+3x\\97-7=5x\\5x=90\\x=\frac{90}{5}\\x=18 \ cm](https://tex.z-dn.net/?f=Periemter%20%5C%20of%20%5C%20triangle%3D%20Sum%20%5C%20of%20%5C%20all%20%5C%20sides%20%5C%20of%20%5C%20triangle%5C%5C97%3Dx%2B7%2Bx%2B3x%5C%5C97-7%3D5x%5C%5C5x%3D90%5C%5Cx%3D%5Cfrac%7B90%7D%7B5%7D%5C%5Cx%3D18%20%5C%20cm)
So, value of x=18 cm
The length of EF = x = 18 cm
Option A is correct.
Answer:
A overly complicated triangle.
Step-by-step explanation: Good luck...
Answer:
The answer is
Step-by-step explanation:
50 premium car washes
75 quick car washes
Answer:
9
Step-by-step explanation:
Three sides are
Let other side be x
![\rm \mapsto \: x + 4 + 2 + 6 = 21 \\ \rm \mapsto \: x + 6 + 6 = 21 \\ \rm \mapsto \: x + 12 = 21 \\ \rm \mapsto \: x = 21 - 12 \\ \rm \mapsto \: x = 9](https://tex.z-dn.net/?f=%20%5Crm%20%5Cmapsto%20%5C%3A%20x%20%2B%204%20%2B%202%20%2B%206%20%3D%2021%20%5C%5C%20%5Crm%20%5Cmapsto%20%5C%3A%20x%20%2B%206%20%2B%206%20%3D%2021%20%5C%5C%20%20%20%5Crm%20%5Cmapsto%20%5C%3A%20x%20%2B%2012%20%3D%2021%20%5C%5C%20%20%5Crm%20%5Cmapsto%20%5C%3A%20x%20%3D%2021%20-%2012%20%5C%5C%20%20%5Crm%20%5Cmapsto%20%5C%3A%20x%20%3D%209)