4) Answer is D.
Irrational numbers cannot be classified as rational numbers
5) Answer is B.
Every irrational number is a real number
Answer:

Step-by-step explanation:
Using the section formula
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=
=
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Answer:
i. terms = 5xy(z)^2 , -3zy
coefficient = 5 and -3
ii. terms = 1 , X ,x^2
coefficient = 1 , 1
iv. terms = 3 , -pq , qr, -rp
coefficient = -1 ,1 , -1
v. terms = X/2 , y/2 , -xy
coefficient= 1/2 ,1/2 and -1
Answer: Its hard to explain, so I'll just give you the answer (47 degrees)