Answer:
A. n = 5
Step-by-step explanation:
S = n² + n
When S = 30:
n² + n = 30
Subtract 30 from both sides: n² + n - 30 = 0
Factorize: (n - 5)(n + 6) = 0
Therefore n = 5 or -6
As n > 2, then n = 5 only
6.5 is the answer for that problem
The least common multiple (lcm) is 405
Answer:1/2
Step-by-step explanation:
Solution:

Step 1:
For angle D, Opposite is 12 and adjacent 20