Answer:
you need to give us a mathematical equation to answer that
Step-by-step explanation:
please add
Yes. They are both right.
Answer:
Perimeter of Triangle: 

Step-by-step explanation:
The perimeter is the sum of all of the sides of the triangle.
Hence, the perimeter 
Since the perimeter is 90,
.
Subtract 15 from both sides:


Divide both sides by 6:


Answer:
b
Step-by-step explanation: