exam Maths Puzzle Numerical Ability

can someone please help me solve this problem? 3(x-2)-5(2x-1)>0. The greater than sign should have a _ under it.

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Steve traveled 600 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle. Find the volume of the hemisphere shown. Remember a hemisphere is half of a sphere. (It shows a hemisphere with a radius=5 inches)