exam Maths Puzzle Numerical Ability

find the inverse of each function

m:x (2x-1)-3
_
4
________
5

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exam Other Question

Describe whether the equation dfines y to be a function of x. Find the domain.

y = (x - 3)^2 y= -x^2

xy=1

y=-x^3

Please help me describe whether the given relations describe y as a function of x. Also what is the domain of each relation and/or function.

I have