exam Maths Puzzle Numerical Ability

On page 175

I need help on this one.

7x+3>9x-5

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exam Other Question

Need help with this question. Find the domain and range of the reation R= {(x,y)| y<= 2x, x and y positive integers less than 6}. A 6-passenger plane cruises at 180 mph in calm air. If the plane files 7 miles with the wind in the same smount of time as it flies 5 miles against the wind, then what is the wind speed?