Step-by-step explanation:

making m the subject first by dividing through by 4


from the question, given n = -1 ,0 ,1
so when n= -1


when n=0



when n=1


Answer:
It is an obtuse angle!
Step-by-step explanation:
2 kids cross, one brings the boat back, one parent crosses, the other kid brings the boat back, both kids cross again, one kid brings the boat back, other parent crosses, the other kid brings the boat back, both kids cross again, one kid brings the boat back, the fisherman crosses, the other kid brings the boat back, both kids cross again. the fisher man is on the side where the kids and parents are. he can take the boat. total trips 11.