Answer:
s=7
p=3s
Step-by-step explanation:
The perimeter is the side length times 3
So the equation would be p=3s
Plug in 21 for p
21=3s
That means s=7
Answer:
perimeter = 14
Step-by-step explanation:
perimeter = ∑sides
= x + (x + 3) + (x + 4) --------eq.
= 3x + 7
3x = 7
x = 7/3
plugin values into the equation:
perimeter = ⁷/₃ + (⁷/₃ + 3) + (⁷/₃ + 4)
= 14
therefore, the perimeter of a triangle is 14
<span>Even though matter changes state, there are two things which are always conserved: they are mass and chemical composition. Just because the state has changed, it does not mean that any new molecules are either created or have been destroyed. The Law of Conservation of mass explains this concept.</span>