exam Maths Puzzle Numerical Ability

(6x+2)^1/3 - 4 = 3

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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 Please help. This book is pretty useless. We are given 2 separate books, one has questions for test. Here is the question:

Choose one of the three conjectures below. Draw a diag