Question

please help me i need to turn in assignment!!!!! i will mark the answer brainliest. plz be descriptive!!!

Answer 1

Answer: D. 150

Step-by-step explanation:

Given equation: $3(3x-10)=5(x+10)$ , it shows the relationship between the perimeter of an equilateral triangle and the perimeter of an equilateral triangle.

Consider $3(3x-10)=5(x+10)$

$\Rightarrow\ 9x-30=5x+50\\\\\Rightarrow\ 9x-5x= 50+30\\\\\Rightarrow\ 4x= 80\\\\\Rightarrow\ x=\dfrac{80}{4}\\\\\Rightarrow\ x= 20$

Now, perimeter of pentagon  = 5(x+10) = 5 (20+10)

= 5(30) = 150

Hence, option D is correct.