Ch – 9 Algebraic Expressions

Q.1: What is the coefficient of x in y – 8 + x ?

a) 8

b) 1

c) (-8)

Q.2: The sum of pq + 3p and 4q – 3pq is ________________.

a) 3p + 4q – 2pq

b) 3p + 4pq – 4q

c) 7pq – 2pq

Q.3: The constant term in the expression 1 + x + xy is ________.

a) x

b) xy

c) 1

Q.4: The number of terms in the expression 0.5r + 0.6pr – 2.5qr is ________________.

a) 3

b) 2

c) 4

Q.5: The expression 47z + 38y is ____________.

a) monomial

b) binomial

c) trinomial

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Q.6: By subtracting 2t + 15pq from 18pq – 5t, we will get _______________.

a) 3pq – 3t

b) 3pq – 7t

c) 3pq + 7t

Q.7: If x = 0 and y = (-1), then the value of 5x + 2y will be ________.

a) 0

b) (-1)

c) (-2)

Q.8: The value of expression 2( x – 4 ) + 10 at x =2 is ___________.

a) 6

b) (-6)

c) (-3)

Q.9: What should be the value of y if y2 + y – b = 3 for y = 1 ?

a) 0

b) 1

c) (-1)

Q.10: The common factor in the terms 35xy and (-14)r is ___________.

a) 7

b) 10

c) 7xyr

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Q.11: Area of the rectangle with length as 3q and breadth as 4p is _______.

a) 12pq

b) 7pq

c) 14pq

Q.12: Value of (9x + 6) and (4y + 3) is _________________.

a) 36xy + 27x + 24y + 18

b) 18xy + 42xy + 20

c) 12xy + 14x + 21y + 2

Q.13: The suitable identity to find the value of (4 + p) (4 + p) is ______________.

a) (a – b)2

b) (a + b)2

c) Either ‘a’ or ‘b’

Q.14: Using identity (x + a) (x + b) = x2 + (a + b)x + ab, find the answer of (n + 5) (n + 6).

a) n2 + 30n + 30

b) n2 + 12n + 20

c) n2 + 11n + 30

Q.15: (a – b)2 = ______________.

a) a2 – 2ab – b2

b) a2 + 2ab – b2

c) a2 – 2ab + b2

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Q.16: Find the value of 95 and 105 by using suitable identity.

a) 9925

b) 9975

c) 9950

Q.17: The product of 2x and (5xy + 3y) is _______________.

a) 16x2 y

b) 10x2 y + 6xy

c) 6xy + 15x2

Q.18: Using suitable identity, find the value of (7.3)2

a) 53.29

b) 53.29

c) 5.329

Q.19: Using the identity (x + a) (x + b) = x2 + (a + b)x + ab, find the value of 101 x 102.

a) 10002

b) 10302

c) 10332

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Q.20: The length, breadth and height of a cuboid is 2a3 , 5ab and 3x respectively. Find its volume.

a) 30a4 bx

b) 30a3 bx

c) 15abx

Answers:

https://amzn.to/38zyfrm

  1. b
  2. a
  3. c
  4. a
  5. b
  6. b
  7. c
  8. a
  9. c
  10. a
  11. a
  12. a
  13. b
  14. c
  15. c
  16. b
  17. b
  18. a
  19. b
  20. a

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Published by Priya Prakash

In the midst of winter, i found there was within me an invincible summer ~ Albert Camus

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