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20 12 the answer to the 25 questions of mathematics in Nantong senior high school entrance examination should be 2.9 hours.
(3) Let the resolution function corresponding to the line segment OA be y=mx(0≤x≤5),

∫ The coordinate of point A is (5300). If you substitute the analytical formula y=mx and 300=5m, the solution is: m=60.

The resolution function corresponding to line segment OA is y=60x(0≤x≤5).

From 60x =110x-195, the solution is: x=3.9.

A: The car overtook the van 3.9 hours after the first place.

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