exam Maths Puzzle Numerical Ability

8/5x = 9 , x+4/7=3/5 , evaluate: ab+abc-bc if a=3,b=12 and c=1/6 ,

use two unit multiplyers to convert 74 kilometers to centimeters ,

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exam Other Question
Find the domain of the function algebraically:
f(x) = (x^2+ 4)^1/2 FIND THE MEAN AND THE MEDIAN OF THE FOLLOWING SET OF NUMBERS:

-10, -4, 5, 9, 11, 13

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