A.12 B.48 C.192 D.256 E.512 If (5x-4y) = 4(2x-3y) , then x : y = ………. A. 3:8 B. 8:3 C. 12: 17 D. 6:-13 E. 13:18 If x:y = 2:3 , find (x2 + y2):(x2-y2). A. 2:5 B. 13:-5 C.6:13 D. 6:-13 E. (9:13) 20.Let x,y,z

. A quadratic equation with roots -3 and 5 is A.x2-15=0 B. x2-8x-15=0 C.x2+8x-15=0 D. x2+2x-15=0 E. x2-2x-15=0 A quadratic equation with solution set {1/3,1/4} is A.12x2=7x+1 B.12x2=7x-1 C.12x2=x+1 D.12x2=x-1

(8) An arc PQ subtends an angle of 120° at the centre of a circle of radius 1 cm. The length of arc PQ is A. 120 cm B. 60 cm C. π/6cm D. 2π/3cm E.π^2/18 cm (9) If y varies inversely as the cube of (x+1)

S = {1,2,3,4} and T = {8,9}. If the image is of each odd number in S is 9 and the image of each even number is 8, describe the function by an arrow diagram. Write down the set of ordered pairs for this

Define the following terms. (8 marks) (a) Electron affinity (b) Gay-lussac’s law of oxidation number (c) Molarity (d) Electrolysis (e) Reduction in terms of oxidation number (f) A catalyst (g) Chemical

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