Answer:
As we can see, what we are doing is substracting 4 from one term to the next:
22 - 4 = 18
18 - 4 = 14
14 - 4 = 10
10 - 4 = 6
Knowing this and that we start on 22, we can say that for n term we have:
So, if we're searching the thirs term, we replace n by 3 (we can also see it in the question):
= 
So the third term is 14.
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Answer:
180-65 = 115
Step-by-step explanation:
it is 115 since <7 <6 are a linear pair so they make a 180 angle so 180-65 is 115
summation from k equals 1 to 5 cosine k pi
= Cosine 1*∏ + Cosine 2*∏ + Cosine 3*∏ + Cosine 4*∏ + Cosine 5*∏
= -1 + 1 + -1 + 1 + -1
= -1
Step-by-step explanation:
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