Hi,
A)

B)
Only if n=4*k or n=4*k+1 , k beeing an integer.
Answer:https://www.wolframalpha.com/pro/step-by-step-math-solver?src=widget
Step-by-step explanation: hope this helps
Answer:
19
Step-by-step explanation:
5x8 is 40
59-40 is 19
51T+9
51×T+9
These are the answers .. chose anyone because they both mean the same thing but the first one is more sophisticated