exam Maths Puzzle Numerical Ability

please!

if f(3/x)=2x-1/3

compute

f(x)=?

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exam Other Question

This is a problem from our homework. I can get all of the answers except for part d.

20. A car that weighs 3000 lbs is at rest on a hill. Three forces are acting on the car: th please expand

X x (X+gs-g)+(s-1)