Answer:
Step-by-step explanation:
8 answer option a
[tex]\huge{\underline{\underline{\mathfrak{Answer :}}}}[/tex]
[tex]\Large{\rm{Question \ 6 :}}[/tex]
A quadratic binomial is a second degree binomial,
So, A.T.Q
[tex]\sf{\rightarrow (x + 2)(x - 2)} \\ \sf{\rightarrow x^2 \cancel{- 2x} \cancel{+ 2x} - 4} \\ \sf{\rightarrow x^2 - 4} [/tex]
[tex]\therefore[/tex] Option B is the correct answer.
[tex]\Large{\rm{Question \ 7 :}}[/tex]
[tex]\sf{\rightarrow 2x + 5 = 45° \ \ \ \ \ \ (Vertical \ opposite \ angles)} \\ \sf{\rightarrow 2x = 45 - 5} \\ \sf{\rightarrow 2x = 40} \\ \sf{\rightarrow x = \dfrac{\cancel{40}}{\cancel{2}}} \\ \sf{\rightarrow x = 20°}[/tex]
[tex]\Large{\rm{Question \ 8 :}}[/tex]
For a point to lie on the Y-axis, its abscissa i.e. distance from Y-axis = 0.
Option B is the correct answer.
[tex]\Large{\rm{Question \ 9 :}}[/tex]
Volume of cylinder = πr²h
[tex]\sf{\rightarrow Volume = \pi \times 5² \times 4 } \\ \sf{\rightarrow Volume = \pi \times 25 \times 4} \\ \sf{\rightarrow Volume = 100 \pi cm^3}[/tex]
[tex]\therefore[/tex] Option D is the correct answer.
[tex]\Large{\rm{Question \ 10 :}}[/tex]
The measure of each exterior angle of a regular pentagon is 72°.
[tex]\therefore[/tex] Option C is the correct answer.
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Answers & Comments
Answer:
Step-by-step explanation:
8 answer option a
[tex]\huge{\underline{\underline{\mathfrak{Answer :}}}}[/tex]
[tex]\Large{\rm{Question \ 6 :}}[/tex]
A quadratic binomial is a second degree binomial,
So, A.T.Q
[tex]\sf{\rightarrow (x + 2)(x - 2)} \\ \sf{\rightarrow x^2 \cancel{- 2x} \cancel{+ 2x} - 4} \\ \sf{\rightarrow x^2 - 4} [/tex]
[tex]\therefore[/tex] Option B is the correct answer.
______________________
[tex]\Large{\rm{Question \ 7 :}}[/tex]
[tex]\sf{\rightarrow 2x + 5 = 45° \ \ \ \ \ \ (Vertical \ opposite \ angles)} \\ \sf{\rightarrow 2x = 45 - 5} \\ \sf{\rightarrow 2x = 40} \\ \sf{\rightarrow x = \dfrac{\cancel{40}}{\cancel{2}}} \\ \sf{\rightarrow x = 20°}[/tex]
______________________
[tex]\Large{\rm{Question \ 8 :}}[/tex]
For a point to lie on the Y-axis, its abscissa i.e. distance from Y-axis = 0.
So, A.T.Q
Option B is the correct answer.
______________________
[tex]\Large{\rm{Question \ 9 :}}[/tex]
Volume of cylinder = πr²h
[tex]\sf{\rightarrow Volume = \pi \times 5² \times 4 } \\ \sf{\rightarrow Volume = \pi \times 25 \times 4} \\ \sf{\rightarrow Volume = 100 \pi cm^3}[/tex]
[tex]\therefore[/tex] Option D is the correct answer.
______________________
[tex]\Large{\rm{Question \ 10 :}}[/tex]
The measure of each exterior angle of a regular pentagon is 72°.
[tex]\therefore[/tex] Option C is the correct answer.