exam Maths Puzzle Numerical Ability

what if u have a problem like this one -2y=6+4y how do u change that one into standard form y=mx+b

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given that -2y=6+4y,or 6y=-6 or y=-1 ie... y=0x+(-1)
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exam Other Question

Comparing Earthquakes:

Two earthquakes differ by 1.0 when measured on the Richter scale. How would the seismographic readings differ at a distance of 100 kilometers from the ep Decide whether or not the functions are inverses of each other..

f(x)=6x^2+5, Domain [0,Infiniti); g(x)=sqrt of (x-5)/(6), domain [5,Infiniti)

I believe they are??? Am I correct?