Page 146 - ICSE Math 6

9. If x = 3, y = 2 and z = 4, then find the value of the following expressions.
2
x
(a) x (b) 2y (c) 3z + x
2
2
2
2
2
(d) 3x – 2y + 6z (e) 8x – 2y – 3z (f) xy – y z + z x
10. A cinema hall has Gold class and Silver class seats. The cinema hall charges ` 350 each for Gold
class seats and ` 250 each for Silver class seats.
(i) What formula represents the collection of the cinema hall per show in terms of the number
of seats booked?
(ii) What is the collection, if 80 Gold class and 150 Silver class seats are booked?
11. A furniture shop gives discount based on the amount of purchase. The formula 0.12x represents
the discount given, in rupees, by the shop on a purchase of ` x. What discount one will get on a
purchase of ` 28,000?

THINK SMART

1. Arshi correctly added two terms to get a single term. Which of the following can be true for this
case?

(a) She added like terms. (b) She added unlike terms. (c) She added constants.
2. If the sum of two different monomials is multiplied by another monomial, then the result is a:

(a) constant (b) monomial (c) binomial (d) trinomial
2
3. Consider the expression x + xy – 7x. What type of expression (monomial, binomial or trinomial)
will it become if you substitute a given value of x in it?
4. Ravi subtracted a monomial from 3xy. For x = 2 and y = 3, the value of the expression he obtained
is 5. What is the value of the monomial that he subtracted for x = 2 and y = 3?

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