Algebraic Formulae

Question 8: Given x= 5w 2w−y . (i) Express w in terms of x and y. (ii) Find the value of w when x=10 and y=15. Solution: (i) x= 5w 2w−y 2wx−xy=5w 2wx−5w=xy w( 2x−5 )=xy w= xy 2x−5 (ii) w= ( 10 )( 15 ) 2( 10 )−5   = 150 15   =10 Question 9: Azmin is h years old. His father is twice his brother’s age. If Azmin is 3 years older … Read more

Question 5: Given 8 s − 3 h 4 = 2 , express s in terms of h. Solution: 8 s − 3 h 4 = 2 8 s − 3 h 4 = 4 ← Square both sides 8 s − 3 h = 16 8 s = 16 + 3 h s = … Read more

3.2.1 Algebraic Formulae, PT3 Practice   Question 1: Given m2+ 7 = k, express m in terms of k. Solution: m 2 + 7 = k m 2 = k − 7 m = k − 7    Question 2: Given 5km = mn – 2k, express k in terms of m and n. Solution: … Read more

3.1 Algebraic Formulae 3.1.1 Variables and Constant 1. A variable is a quantity without a fixed value. 2. A constant is a quantity with a fixed value. 3.1.2 Concept of Formulae 1. An algebraic formula is an equation which shows the relationship between several variables and/ or constant. 2. The subject of an algebraic formula is a linear variable … Read more