Answer:

=> Amelia's answer is incorrect
Step-by-step explanation:
Answer:
27%
Step-by-step explanation:
Decrease= 15-11
=4
Percentage=4÷15
=0.266666667
=26.667%
~27%
It is 1/4 of the area of the larger triangle...basically if you connect the three midpoints of the triangle's sides it creates four identical smaller triangles...
The perimeter is one half of the larger triangle...
Number 3 is 100 number 4 is 112
Answer:
x= - 1.48 or 0.48
Step-by-step explanation:
I used general formula. Hope I'm on a right path.