Answer:
3
Step-by-step explanation:
It's given that ΔDEF ∼ΔXYZ . So the corresponding sides of both triangles will be proportional to each other.

DE = 4 ; XY = 4(n + 1) ; EF = 5 ; YZ = 7n - 1
Putting all these values gives ,







Answer:

Step-by-step explanation:
Answer:
A carbon atom.
Step-by-step explanation:
All carbon atoms have 6 protons however the amount of neutrons can vary but doesnt change the element.
There are 3 co-efficients in this expression