Mean is average
triangle has 3 sides
mean of its sides is
if the sides are a,b,c meause then mean of the sides is (a+b+c)/3=mean=18
perimiter=a+b+c
therefor
perimiter/3=18
multiply both sides by 3
perimiter=54 yardds
Since there is nothing attached for me to help you I looked for a website that can find the answer with an explanation. It is called quickmath it’s like a math calculator . Hopefully that helps you .
37.5% of n is 81
0.375n=81
n=216
Answer:
X = 2, -8
Step-by-step explanation: