exam Maths Puzzle Numerical Ability

Simplify: 16x^2+8+1
___________
1-16x^2

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exam Other Question

Does anyone know how to do this problem?

I need to find the constant of variation k

M varies directly with N; M = 144 when N= 8

Thanks,
sher y=square root of x-2 fill in the following table for x=0,1,2,3,4
Round to three decimal places where necessary.
X Y
0
1
2
3
4