exam
Maths Puzzle
Numerical Ability
can some one check this for me please
sqrt7(8sqrt6-3sqrt7)
(sqrt7*8sqrt6)-3*7sqrt7
8sqrt42-3*7sqrt7
8sqrt42-(7*7)
8sqrt42-21
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exam Other Question
Jon buys a new truck for $ 42700.The truck depreciates by 19&1/2% annually. What is the common ratio ratio for the value of the truck in successive years???
I think it is 0.195???
Find the domain and range for the function. Use interval notation.
f(x)= (x^2 + x - 12)/[(x-3)(x+5)]