exam Maths Puzzle Numerical Ability

Bobby and Ricky are in a 10 lap race on a 1-mile oval track. Bobby averaging 90mph, has completed 2 laps just as Ricky gets his car on the track. What speed does rick have to average to be even with Bobby at the end of the 10th lap.

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exam Other Question

WHAT IS THE DOMAIN OF THIS FUNCTION AND THE VERTICAL ASYMPTOTES

x^2-2x/3x^3-3x^2-6x this is what i got in lowest terms x/3x(x+1) is this right?
so will the vertical asymptotes be x=0 and x=-1?
please help me thank you:)
i need help on four problems y - 57=72 i need the inverse operation of that,
the inverse operation of x over 2 (like a fraction looks) =18, this is the last one i need the inverse