Answer: C
Step-by-step explanation:
Bcuz when its square it results to something known as the perfect square trinomial. Thats the way i learned it. Ion know if u learned it the same way pero i hope this helps.
Answer:
K = 
Step-by-step explanation:
P = KTV
Divide both sides by TV
(P/TV) = K
It would be 100. Hope it helps!
The answer is 50 because if u add 20 and 50 it makes 70:)