Exercise No. 5A

NOTE: Answers to all questions are given at the end of this exercise.

Question No. 1:
Write an algebraic expression for each of the following:
(a) add 2x to 14
(b) subtract 14 to 5a
(c) multiply 4 by 2k
(d) divide 8x by 24y
(e) add 2x to twice 3y
(f) subtract 5x from half of y

 

NOTE: Answers to all questions are given at the end of this exercise.

Question No. 2:
Translate each of the following word expression into algebraic expression.
(a) the sum of a number 2x and a number y
(b) the product of 8 and a number k
(c) fifteen subtracted from twice the number t
(d) three times the number u decreased by 4
(e) eight more than half of a number v
(f) the total value of h 50 coins and k $2 notes in dollars
(g) the total cost of buying x sets of stamps to commemorate the 50th anniversary of the inter-religious organisation (IRO) at $1.82 per set, and y set of rabbit zodiac series at $2.22 per set.

 

NOTE: Answers to all questions are given at the end of this exercise.

Question No. 3:
Write an algebraic expression for each of the following:
(a) the cost of x litres of petrol at $1.10 per litre
(b) three times the variable x divided by the sum of 3 and k
(c) five times the number which is 3 more than h
(d) one quarter of the number which is 4 less than m
(e) the total number of eggs in the cartons where each carton contains n eggs
(f) the total distance traveled by a car for x hours at a constant speed of z km/h

 

NOTE: Answers to all questions are given at the end of this exercise.

Question No. 4:
Mary is x years old. Write an algebraic expression for each of the following.
(a) three times Mary’s age next year
(b) five times Mary’s age 6 years ago
(c) the present age of Mary’s aunt if her aunt is four times as old as Mary will be 2 years from now.
(d) the present age of Mary’s niece if her niece is 3 years less than one-third Mary’s age 5 years ago.


Answers

(from left to right)

 5a-i 5a-ii 5a-iii

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